Home / 128,915,375.20-193,373,062.80-99,690,056.80

Finding the Fourth Proportional to 128,915,375.20, 193,373,062.80 and 99,690,056.80

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Solution

The fourth proportional to 128,915,375.20, 193,373,062.80 and 99,690,056.80 is: 149,535,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,915,375.20 : 193,373,062.80 = 99,690,056.80 : x
  2. Step 2: Convert to fraction form
    128,915,375.20/193,373,062.80 = 99,690,056.80/x
  3. Step 3: Cross multiply
    128,915,375.20x = 193,373,062.80 × 99,690,056.80
  4. Step 4: Simplify right side
    128,915,375.20x = 19,277,371,614,121,968
  5. Step 5: Solve for x
    x = 19,277,371,614,121,968/128,915,375.20
  6. Step 6: Final answer
    x = 149,535,085.20

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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.