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Finding the Fourth Proportional to 57,400.80, 86,016.96 and 40,792.80

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Solution

The fourth proportional to 57,400.80, 86,016.96 and 40,792.80 is: 61,129.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,400.80 : 86,016.96 = 40,792.80 : x
  2. Step 2: Convert to fraction form
    57,400.80/86,016.96 = 40,792.80/x
  3. Step 3: Cross multiply
    57,400.80x = 86,016.96 × 40,792.80
  4. Step 4: Simplify right side
    57,400.80x = 3,508,872,645.89
  5. Step 5: Solve for x
    x = 3,508,872,645.89/57,400.80
  6. Step 6: Final answer
    x = 61,129.33

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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.