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Finding the Fourth Proportional to 72,565.47, 108,746.15 and 57,708.45

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Solution

The fourth proportional to 72,565.47, 108,746.15 and 57,708.45 is: 86,481.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,565.47 : 108,746.15 = 57,708.45 : x
  2. Step 2: Convert to fraction form
    72,565.47/108,746.15 = 57,708.45/x
  3. Step 3: Cross multiply
    72,565.47x = 108,746.15 × 57,708.45
  4. Step 4: Simplify right side
    72,565.47x = 6,275,571,471.43
  5. Step 5: Solve for x
    x = 6,275,571,471.43/72,565.47
  6. Step 6: Final answer
    x = 86,481.51

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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.