Home / 85,646,153.70-128,469,230.55-28,140,300.90

Finding the Fourth Proportional to 85,646,153.70, 128,469,230.55 and 28,140,300.90

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Solution

The fourth proportional to 85,646,153.70, 128,469,230.55 and 28,140,300.90 is: 42,210,451.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,646,153.70 : 128,469,230.55 = 28,140,300.90 : x
  2. Step 2: Convert to fraction form
    85,646,153.70/128,469,230.55 = 28,140,300.90/x
  3. Step 3: Cross multiply
    85,646,153.70x = 128,469,230.55 × 28,140,300.90
  4. Step 4: Simplify right side
    85,646,153.70x = 3,615,162,804,068,472
  5. Step 5: Solve for x
    x = 3,615,162,804,068,472/85,646,153.70
  6. Step 6: Final answer
    x = 42,210,451.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.