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Finding the Fourth Proportional to 78,755.72, 118,134.04 and 19,591.40

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Solution

The fourth proportional to 78,755.72, 118,134.04 and 19,591.40 is: 29,387.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,755.72 : 118,134.04 = 19,591.40 : x
  2. Step 2: Convert to fraction form
    78,755.72/118,134.04 = 19,591.40/x
  3. Step 3: Cross multiply
    78,755.72x = 118,134.04 × 19,591.40
  4. Step 4: Simplify right side
    78,755.72x = 2,314,411,231.26
  5. Step 5: Solve for x
    x = 2,314,411,231.26/78,755.72
  6. Step 6: Final answer
    x = 29,387.21

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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.