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Finding the Fourth Proportional to 72,603,698.70, 108,924,793.65 and 31,645,562.70

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Solution

The fourth proportional to 72,603,698.70, 108,924,793.65 and 31,645,562.70 is: 47,476,732.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,603,698.70 : 108,924,793.65 = 31,645,562.70 : x
  2. Step 2: Convert to fraction form
    72,603,698.70/108,924,793.65 = 31,645,562.70/x
  3. Step 3: Cross multiply
    72,603,698.70x = 108,924,793.65 × 31,645,562.70
  4. Step 4: Simplify right side
    72,603,698.70x = 3,446,986,387,035,637
  5. Step 5: Solve for x
    x = 3,446,986,387,035,637/72,603,698.70
  6. Step 6: Final answer
    x = 47,476,732.57

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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.