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Finding the Fourth Proportional to 82,703,404.80, 124,055,107.20 and 81,427,946.40

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Solution

The fourth proportional to 82,703,404.80, 124,055,107.20 and 81,427,946.40 is: 122,141,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,703,404.80 : 124,055,107.20 = 81,427,946.40 : x
  2. Step 2: Convert to fraction form
    82,703,404.80/124,055,107.20 = 81,427,946.40/x
  3. Step 3: Cross multiply
    82,703,404.80x = 124,055,107.20 × 81,427,946.40
  4. Step 4: Simplify right side
    82,703,404.80x = 10,101,552,619,727,856
  5. Step 5: Solve for x
    x = 10,101,552,619,727,856/82,703,404.80
  6. Step 6: Final answer
    x = 122,141,919.60

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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.