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Finding the Fourth Proportional to 72,503,865.60, 108,755,798.40 and 43,838,419.20

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Solution

The fourth proportional to 72,503,865.60, 108,755,798.40 and 43,838,419.20 is: 65,757,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,503,865.60 : 108,755,798.40 = 43,838,419.20 : x
  2. Step 2: Convert to fraction form
    72,503,865.60/108,755,798.40 = 43,838,419.20/x
  3. Step 3: Cross multiply
    72,503,865.60x = 108,755,798.40 × 43,838,419.20
  4. Step 4: Simplify right side
    72,503,865.60x = 4,767,682,280,689,890
  5. Step 5: Solve for x
    x = 4,767,682,280,689,890/72,503,865.60
  6. Step 6: Final answer
    x = 65,757,628.80

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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.