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Finding the Fourth Proportional to 78,498.60, 117,747.90 and 64,591.35

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Solution

The fourth proportional to 78,498.60, 117,747.90 and 64,591.35 is: 96,887.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,498.60 : 117,747.90 = 64,591.35 : x
  2. Step 2: Convert to fraction form
    78,498.60/117,747.90 = 64,591.35/x
  3. Step 3: Cross multiply
    78,498.60x = 117,747.90 × 64,591.35
  4. Step 4: Simplify right side
    78,498.60x = 7,605,495,820.67
  5. Step 5: Solve for x
    x = 7,605,495,820.67/78,498.60
  6. Step 6: Final answer
    x = 96,887.03

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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.