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Finding the Fourth Proportional to 91,115.28, 136,582.20 and 63,354.96

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Solution

The fourth proportional to 91,115.28, 136,582.20 and 63,354.96 is: 94,969.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,115.28 : 136,582.20 = 63,354.96 : x
  2. Step 2: Convert to fraction form
    91,115.28/136,582.20 = 63,354.96/x
  3. Step 3: Cross multiply
    91,115.28x = 136,582.20 × 63,354.96
  4. Step 4: Simplify right side
    91,115.28x = 8,653,159,817.71
  5. Step 5: Solve for x
    x = 8,653,159,817.71/91,115.28
  6. Step 6: Final answer
    x = 94,969.36

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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.