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Finding the Fourth Proportional to 85,604.40, 128,552.40 and 56,152.80

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Solution

The fourth proportional to 85,604.40, 128,552.40 and 56,152.80 is: 84,324.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,604.40 : 128,552.40 = 56,152.80 : x
  2. Step 2: Convert to fraction form
    85,604.40/128,552.40 = 56,152.80/x
  3. Step 3: Cross multiply
    85,604.40x = 128,552.40 × 56,152.80
  4. Step 4: Simplify right side
    85,604.40x = 7,218,577,206.72
  5. Step 5: Solve for x
    x = 7,218,577,206.72/85,604.40
  6. Step 6: Final answer
    x = 84,324.84

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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.