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Finding the Fourth Proportional to 78,753,602.70, 118,130,404.05 and 71,573,244.30

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Solution

The fourth proportional to 78,753,602.70, 118,130,404.05 and 71,573,244.30 is: 107,359,866.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,753,602.70 : 118,130,404.05 = 71,573,244.30 : x
  2. Step 2: Convert to fraction form
    78,753,602.70/118,130,404.05 = 71,573,244.30/x
  3. Step 3: Cross multiply
    78,753,602.70x = 118,130,404.05 × 71,573,244.30
  4. Step 4: Simplify right side
    78,753,602.70x = 8,454,976,268,328,359
  5. Step 5: Solve for x
    x = 8,454,976,268,328,359/78,753,602.70
  6. Step 6: Final answer
    x = 107,359,866.45

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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.