Home / 128,894,921.40-193,342,382.10-77,934,127.80

Finding the Fourth Proportional to 128,894,921.40, 193,342,382.10 and 77,934,127.80

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Solution

The fourth proportional to 128,894,921.40, 193,342,382.10 and 77,934,127.80 is: 116,901,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,894,921.40 : 193,342,382.10 = 77,934,127.80 : x
  2. Step 2: Convert to fraction form
    128,894,921.40/193,342,382.10 = 77,934,127.80/x
  3. Step 3: Cross multiply
    128,894,921.40x = 193,342,382.10 × 77,934,127.80
  4. Step 4: Simplify right side
    128,894,921.40x = 15,067,969,915,737,832
  5. Step 5: Solve for x
    x = 15,067,969,915,737,832/128,894,921.40
  6. Step 6: Final answer
    x = 116,901,191.70

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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.