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Finding the Fourth Proportional to 72,443,863.80, 99,963,449.19 and 48,973,469.13

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Solution

The fourth proportional to 72,443,863.80, 99,963,449.19 and 48,973,469.13 is: 67,577,247.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,443,863.80 : 99,963,449.19 = 48,973,469.13 : x
  2. Step 2: Convert to fraction form
    72,443,863.80/99,963,449.19 = 48,973,469.13/x
  3. Step 3: Cross multiply
    72,443,863.80x = 99,963,449.19 × 48,973,469.13
  4. Step 4: Simplify right side
    72,443,863.80x = 4,895,556,893,034,789
  5. Step 5: Solve for x
    x = 4,895,556,893,034,789/72,443,863.80
  6. Step 6: Final answer
    x = 67,577,247.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.