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Finding the Fourth Proportional to 78,375.60, 108,159.12 and 42,565.68

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Solution

The fourth proportional to 78,375.60, 108,159.12 and 42,565.68 is: 58,741.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,375.60 : 108,159.12 = 42,565.68 : x
  2. Step 2: Convert to fraction form
    78,375.60/108,159.12 = 42,565.68/x
  3. Step 3: Cross multiply
    78,375.60x = 108,159.12 × 42,565.68
  4. Step 4: Simplify right side
    78,375.60x = 4,603,866,491.00
  5. Step 5: Solve for x
    x = 4,603,866,491.00/78,375.60
  6. Step 6: Final answer
    x = 58,741.07

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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.