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Finding the Fourth Proportional to 439,686.78, 659,519.24 and 124,139.13

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Solution

The fourth proportional to 439,686.78, 659,519.24 and 124,139.13 is: 186,205.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,686.78 : 659,519.24 = 124,139.13 : x
  2. Step 2: Convert to fraction form
    439,686.78/659,519.24 = 124,139.13/x
  3. Step 3: Cross multiply
    439,686.78x = 659,519.24 × 124,139.13
  4. Step 4: Simplify right side
    439,686.78x = 81,872,144,051.17
  5. Step 5: Solve for x
    x = 81,872,144,051.17/439,686.78
  6. Step 6: Final answer
    x = 186,205.61

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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.