Home / 77,318.40-115,657.20-72,595.20

Finding the Fourth Proportional to 77,318.40, 115,657.20 and 72,595.20

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Solution

The fourth proportional to 77,318.40, 115,657.20 and 72,595.20 is: 108,591.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,318.40 : 115,657.20 = 72,595.20 : x
  2. Step 2: Convert to fraction form
    77,318.40/115,657.20 = 72,595.20/x
  3. Step 3: Cross multiply
    77,318.40x = 115,657.20 × 72,595.20
  4. Step 4: Simplify right side
    77,318.40x = 8,396,157,565.44
  5. Step 5: Solve for x
    x = 8,396,157,565.44/77,318.40
  6. Step 6: Final answer
    x = 108,591.97

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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.