Home / 138,864.92-208,307.08-68,725.40

Finding the Fourth Proportional to 138,864.92, 208,307.08 and 68,725.40

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Solution

The fourth proportional to 138,864.92, 208,307.08 and 68,725.40 is: 103,092.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,864.92 : 208,307.08 = 68,725.40 : x
  2. Step 2: Convert to fraction form
    138,864.92/208,307.08 = 68,725.40/x
  3. Step 3: Cross multiply
    138,864.92x = 208,307.08 × 68,725.40
  4. Step 4: Simplify right side
    138,864.92x = 14,315,987,395.83
  5. Step 5: Solve for x
    x = 14,315,987,395.83/138,864.92
  6. Step 6: Final answer
    x = 103,092.90

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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.