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Finding the Fourth Proportional to 77,308.87, 115,830.17 and 60,435.32

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Solution

The fourth proportional to 77,308.87, 115,830.17 and 60,435.32 is: 90,548.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,308.87 : 115,830.17 = 60,435.32 : x
  2. Step 2: Convert to fraction form
    77,308.87/115,830.17 = 60,435.32/x
  3. Step 3: Cross multiply
    77,308.87x = 115,830.17 × 60,435.32
  4. Step 4: Simplify right side
    77,308.87x = 7,000,232,508.28
  5. Step 5: Solve for x
    x = 7,000,232,508.28/77,308.87
  6. Step 6: Final answer
    x = 90,548.90

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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.