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Finding the Fourth Proportional to 124,689,789.60, 187,034,684.40 and 38,420,512.80

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Solution

The fourth proportional to 124,689,789.60, 187,034,684.40 and 38,420,512.80 is: 57,630,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,689,789.60 : 187,034,684.40 = 38,420,512.80 : x
  2. Step 2: Convert to fraction form
    124,689,789.60/187,034,684.40 = 38,420,512.80/x
  3. Step 3: Cross multiply
    124,689,789.60x = 187,034,684.40 × 38,420,512.80
  4. Step 4: Simplify right side
    124,689,789.60x = 7,185,968,486,034,160
  5. Step 5: Solve for x
    x = 7,185,968,486,034,160/124,689,789.60
  6. Step 6: Final answer
    x = 57,630,769.20

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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.