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Finding the Fourth Proportional to 86,691.32, 130,042.65 and 26,712.44

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Solution

The fourth proportional to 86,691.32, 130,042.65 and 26,712.44 is: 40,070.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,691.32 : 130,042.65 = 26,712.44 : x
  2. Step 2: Convert to fraction form
    86,691.32/130,042.65 = 26,712.44/x
  3. Step 3: Cross multiply
    86,691.32x = 130,042.65 × 26,712.44
  4. Step 4: Simplify right side
    86,691.32x = 3,473,756,352.00
  5. Step 5: Solve for x
    x = 3,473,756,352.00/86,691.32
  6. Step 6: Final answer
    x = 40,070.41

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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.