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Finding the Fourth Proportional to 78,755.66, 118,133.91 and 19,591.34

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Solution

The fourth proportional to 78,755.66, 118,133.91 and 19,591.34 is: 29,387.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,755.66 : 118,133.91 = 19,591.34 : x
  2. Step 2: Convert to fraction form
    78,755.66/118,133.91 = 19,591.34/x
  3. Step 3: Cross multiply
    78,755.66x = 118,133.91 × 19,591.34
  4. Step 4: Simplify right side
    78,755.66x = 2,314,401,005.67
  5. Step 5: Solve for x
    x = 2,314,401,005.67/78,755.66
  6. Step 6: Final answer
    x = 29,387.11

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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.