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Finding the Fourth Proportional to 78,708.60, 118,079.91 and 36,557.82

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Solution

The fourth proportional to 78,708.60, 118,079.91 and 36,557.82 is: 54,844.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,708.60 : 118,079.91 = 36,557.82 : x
  2. Step 2: Convert to fraction form
    78,708.60/118,079.91 = 36,557.82/x
  3. Step 3: Cross multiply
    78,708.60x = 118,079.91 × 36,557.82
  4. Step 4: Simplify right side
    78,708.60x = 4,316,744,095.40
  5. Step 5: Solve for x
    x = 4,316,744,095.40/78,708.60
  6. Step 6: Final answer
    x = 54,844.63

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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.