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Finding the Fourth Proportional to 65,689,425.60, 98,524,807.20 and 20,255,812.80

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Solution

The fourth proportional to 65,689,425.60, 98,524,807.20 and 20,255,812.80 is: 30,380,841.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,689,425.60 : 98,524,807.20 = 20,255,812.80 : x
  2. Step 2: Convert to fraction form
    65,689,425.60/98,524,807.20 = 20,255,812.80/x
  3. Step 3: Cross multiply
    65,689,425.60x = 98,524,807.20 × 20,255,812.80
  4. Step 4: Simplify right side
    65,689,425.60x = 1,995,700,050,799,292.25
  5. Step 5: Solve for x
    x = 1,995,700,050,799,292.25/65,689,425.60
  6. Step 6: Final answer
    x = 30,380,841.86

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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.