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Finding the Fourth Proportional to 71,386.70, 107,080.05 and 68,106.20

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Solution

The fourth proportional to 71,386.70, 107,080.05 and 68,106.20 is: 102,159.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,386.70 : 107,080.05 = 68,106.20 : x
  2. Step 2: Convert to fraction form
    71,386.70/107,080.05 = 68,106.20/x
  3. Step 3: Cross multiply
    71,386.70x = 107,080.05 × 68,106.20
  4. Step 4: Simplify right side
    71,386.70x = 7,292,815,301.31
  5. Step 5: Solve for x
    x = 7,292,815,301.31/71,386.70
  6. Step 6: Final answer
    x = 102,159.30

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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.