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Finding the Fourth Proportional to 78,730.80, 118,096.20 and 77,625.15

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Solution

The fourth proportional to 78,730.80, 118,096.20 and 77,625.15 is: 116,437.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730.80 : 118,096.20 = 77,625.15 : x
  2. Step 2: Convert to fraction form
    78,730.80/118,096.20 = 77,625.15/x
  3. Step 3: Cross multiply
    78,730.80x = 118,096.20 × 77,625.15
  4. Step 4: Simplify right side
    78,730.80x = 9,167,235,239.43
  5. Step 5: Solve for x
    x = 9,167,235,239.43/78,730.80
  6. Step 6: Final answer
    x = 116,437.73

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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.