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Finding the Fourth Proportional to 98,791, 136,331.58 and 54,079

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Solution

The fourth proportional to 98,791, 136,331.58 and 54,079 is: 74,629.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,791 : 136,331.58 = 54,079 : x
  2. Step 2: Convert to fraction form
    98,791/136,331.58 = 54,079/x
  3. Step 3: Cross multiply
    98,791x = 136,331.58 × 54,079
  4. Step 4: Simplify right side
    98,791x = 7,372,675,514.82
  5. Step 5: Solve for x
    x = 7,372,675,514.82/98,791
  6. Step 6: Final answer
    x = 74,629.02

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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.