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Finding the Fourth Proportional to 100,732,679.80, 151,099,019.70 and 80,577,287.80

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Solution

The fourth proportional to 100,732,679.80, 151,099,019.70 and 80,577,287.80 is: 120,865,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,732,679.80 : 151,099,019.70 = 80,577,287.80 : x
  2. Step 2: Convert to fraction form
    100,732,679.80/151,099,019.70 = 80,577,287.80/x
  3. Step 3: Cross multiply
    100,732,679.80x = 151,099,019.70 × 80,577,287.80
  4. Step 4: Simplify right side
    100,732,679.80x = 12,175,149,196,664,768
  5. Step 5: Solve for x
    x = 12,175,149,196,664,768/100,732,679.80
  6. Step 6: Final answer
    x = 120,865,931.70

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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.