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Finding the Fourth Proportional to 99,794,885.10, 149,692,327.65 and 72,921,029.10

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Solution

The fourth proportional to 99,794,885.10, 149,692,327.65 and 72,921,029.10 is: 109,381,543.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,794,885.10 : 149,692,327.65 = 72,921,029.10 : x
  2. Step 2: Convert to fraction form
    99,794,885.10/149,692,327.65 = 72,921,029.10/x
  3. Step 3: Cross multiply
    99,794,885.10x = 149,692,327.65 × 72,921,029.10
  4. Step 4: Simplify right side
    99,794,885.10x = 10,915,718,580,612,384
  5. Step 5: Solve for x
    x = 10,915,718,580,612,384/99,794,885.10
  6. Step 6: Final answer
    x = 109,381,543.65

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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.