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Finding the Fourth Proportional to 99,843,905.80, 149,780,373.90 and 42,336,065.80

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Solution

The fourth proportional to 99,843,905.80, 149,780,373.90 and 42,336,065.80 is: 63,510,253.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,843,905.80 : 149,780,373.90 = 42,336,065.80 : x
  2. Step 2: Convert to fraction form
    99,843,905.80/149,780,373.90 = 42,336,065.80/x
  3. Step 3: Cross multiply
    99,843,905.80x = 149,780,373.90 × 42,336,065.80
  4. Step 4: Simplify right side
    99,843,905.80x = 6,341,111,764,979,002
  5. Step 5: Solve for x
    x = 6,341,111,764,979,002/99,843,905.80
  6. Step 6: Final answer
    x = 63,510,253.47

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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.