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Finding the Fourth Proportional to 99,155,099.80, 148,732,649.70 and 80,979,817.60

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Solution

The fourth proportional to 99,155,099.80, 148,732,649.70 and 80,979,817.60 is: 121,469,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,155,099.80 : 148,732,649.70 = 80,979,817.60 : x
  2. Step 2: Convert to fraction form
    99,155,099.80/148,732,649.70 = 80,979,817.60/x
  3. Step 3: Cross multiply
    99,155,099.80x = 148,732,649.70 × 80,979,817.60
  4. Step 4: Simplify right side
    99,155,099.80x = 12,044,342,843,870,692
  5. Step 5: Solve for x
    x = 12,044,342,843,870,692/99,155,099.80
  6. Step 6: Final answer
    x = 121,469,726.40

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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.