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Finding the Fourth Proportional to 72,508,468.40, 108,762,702.60 and 40,259,841.20

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Solution

The fourth proportional to 72,508,468.40, 108,762,702.60 and 40,259,841.20 is: 60,389,761.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,508,468.40 : 108,762,702.60 = 40,259,841.20 : x
  2. Step 2: Convert to fraction form
    72,508,468.40/108,762,702.60 = 40,259,841.20/x
  3. Step 3: Cross multiply
    72,508,468.40x = 108,762,702.60 × 40,259,841.20
  4. Step 4: Simplify right side
    72,508,468.40x = 4,378,769,135,158,827
  5. Step 5: Solve for x
    x = 4,378,769,135,158,827/72,508,468.40
  6. Step 6: Final answer
    x = 60,389,761.80

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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.