Home / 85,621.20-128,431.80-23,291.70

Finding the Fourth Proportional to 85,621.20, 128,431.80 and 23,291.70

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Solution

The fourth proportional to 85,621.20, 128,431.80 and 23,291.70 is: 34,937.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,621.20 : 128,431.80 = 23,291.70 : x
  2. Step 2: Convert to fraction form
    85,621.20/128,431.80 = 23,291.70/x
  3. Step 3: Cross multiply
    85,621.20x = 128,431.80 × 23,291.70
  4. Step 4: Simplify right side
    85,621.20x = 2,991,394,956.06
  5. Step 5: Solve for x
    x = 2,991,394,956.06/85,621.20
  6. Step 6: Final answer
    x = 34,937.55

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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.