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Finding the Fourth Proportional to 86,868, 130,081.47 and 72,791.01

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Solution

The fourth proportional to 86,868, 130,081.47 and 72,791.01 is: 109,001.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,868 : 130,081.47 = 72,791.01 : x
  2. Step 2: Convert to fraction form
    86,868/130,081.47 = 72,791.01/x
  3. Step 3: Cross multiply
    86,868x = 130,081.47 × 72,791.01
  4. Step 4: Simplify right side
    86,868x = 9,468,761,583.58
  5. Step 5: Solve for x
    x = 9,468,761,583.58/86,868
  6. Step 6: Final answer
    x = 109,001.72

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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.