Home / 138,737,215.80-208,105,823.70-81,294,348.60

Finding the Fourth Proportional to 138,737,215.80, 208,105,823.70 and 81,294,348.60

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Solution

The fourth proportional to 138,737,215.80, 208,105,823.70 and 81,294,348.60 is: 121,941,522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,737,215.80 : 208,105,823.70 = 81,294,348.60 : x
  2. Step 2: Convert to fraction form
    138,737,215.80/208,105,823.70 = 81,294,348.60/x
  3. Step 3: Cross multiply
    138,737,215.80x = 208,105,823.70 × 81,294,348.60
  4. Step 4: Simplify right side
    138,737,215.80x = 16,917,827,377,557,940
  5. Step 5: Solve for x
    x = 16,917,827,377,557,940/138,737,215.80
  6. Step 6: Final answer
    x = 121,941,522.90

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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.