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Finding the Fourth Proportional to 136,937.74, 188,955.29 and 76,500.87

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Solution

The fourth proportional to 136,937.74, 188,955.29 and 76,500.87 is: 105,560.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,937.74 : 188,955.29 = 76,500.87 : x
  2. Step 2: Convert to fraction form
    136,937.74/188,955.29 = 76,500.87/x
  3. Step 3: Cross multiply
    136,937.74x = 188,955.29 × 76,500.87
  4. Step 4: Simplify right side
    136,937.74x = 14,455,244,267.35
  5. Step 5: Solve for x
    x = 14,455,244,267.35/136,937.74
  6. Step 6: Final answer
    x = 105,560.71

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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.