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Finding the Fourth Proportional to 98,881, 136,458.66 and 54,171.88

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Solution

The fourth proportional to 98,881, 136,458.66 and 54,171.88 is: 74,758.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,881 : 136,458.66 = 54,171.88 : x
  2. Step 2: Convert to fraction form
    98,881/136,458.66 = 54,171.88/x
  3. Step 3: Cross multiply
    98,881x = 136,458.66 × 54,171.88
  4. Step 4: Simplify right side
    98,881x = 7,392,222,154.48
  5. Step 5: Solve for x
    x = 7,392,222,154.48/98,881
  6. Step 6: Final answer
    x = 74,758.77

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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.