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Finding the Fourth Proportional to 136,011.78, 187,787.78 and 121,626.79

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Solution

The fourth proportional to 136,011.78, 187,787.78 and 121,626.79 is: 167,926.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,011.78 : 187,787.78 = 121,626.79 : x
  2. Step 2: Convert to fraction form
    136,011.78/187,787.78 = 121,626.79/x
  3. Step 3: Cross multiply
    136,011.78x = 187,787.78 × 121,626.79
  4. Step 4: Simplify right side
    136,011.78x = 22,840,024,882.63
  5. Step 5: Solve for x
    x = 22,840,024,882.63/136,011.78
  6. Step 6: Final answer
    x = 167,926.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.