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Finding the Fourth Proportional to 91,539.12, 137,308.68 and 29,208

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Solution

The fourth proportional to 91,539.12, 137,308.68 and 29,208 is: 43,812

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,539.12 : 137,308.68 = 29,208 : x
  2. Step 2: Convert to fraction form
    91,539.12/137,308.68 = 29,208/x
  3. Step 3: Cross multiply
    91,539.12x = 137,308.68 × 29,208
  4. Step 4: Simplify right side
    91,539.12x = 4,010,511,925.44
  5. Step 5: Solve for x
    x = 4,010,511,925.44/91,539.12
  6. Step 6: Final answer
    x = 43,812

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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.