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Finding the Fourth Proportional to 79,712,893.80, 119,569,340.70 and 78,957,066.60

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Solution

The fourth proportional to 79,712,893.80, 119,569,340.70 and 78,957,066.60 is: 118,435,599.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,712,893.80 : 119,569,340.70 = 78,957,066.60 : x
  2. Step 2: Convert to fraction form
    79,712,893.80/119,569,340.70 = 78,957,066.60/x
  3. Step 3: Cross multiply
    79,712,893.80x = 119,569,340.70 × 78,957,066.60
  4. Step 4: Simplify right side
    79,712,893.80x = 9,440,844,396,967,990
  5. Step 5: Solve for x
    x = 9,440,844,396,967,990/79,712,893.80
  6. Step 6: Final answer
    x = 118,435,599.90

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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.