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Finding the Fourth Proportional to 136,856.88, 205,355.78 and 103,565.88

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Solution

The fourth proportional to 136,856.88, 205,355.78 and 103,565.88 is: 155,402.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,856.88 : 205,355.78 = 103,565.88 : x
  2. Step 2: Convert to fraction form
    136,856.88/205,355.78 = 103,565.88/x
  3. Step 3: Cross multiply
    136,856.88x = 205,355.78 × 103,565.88
  4. Step 4: Simplify right side
    136,856.88x = 21,267,852,068.79
  5. Step 5: Solve for x
    x = 21,267,852,068.79/136,856.88
  6. Step 6: Final answer
    x = 155,402.14

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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.