Home / 78,864-108,836.64-45,332.16

Finding the Fourth Proportional to 78,864, 108,836.64 and 45,332.16

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Solution

The fourth proportional to 78,864, 108,836.64 and 45,332.16 is: 62,560.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,864 : 108,836.64 = 45,332.16 : x
  2. Step 2: Convert to fraction form
    78,864/108,836.64 = 45,332.16/x
  3. Step 3: Cross multiply
    78,864x = 108,836.64 × 45,332.16
  4. Step 4: Simplify right side
    78,864x = 4,933,799,978.34
  5. Step 5: Solve for x
    x = 4,933,799,978.34/78,864
  6. Step 6: Final answer
    x = 62,560.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.