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Finding the Fourth Proportional to 71,386.80, 107,019.96 and 45,033.48

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Solution

The fourth proportional to 71,386.80, 107,019.96 and 45,033.48 is: 67,512.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,386.80 : 107,019.96 = 45,033.48 : x
  2. Step 2: Convert to fraction form
    71,386.80/107,019.96 = 45,033.48/x
  3. Step 3: Cross multiply
    71,386.80x = 107,019.96 × 45,033.48
  4. Step 4: Simplify right side
    71,386.80x = 4,819,481,228.26
  5. Step 5: Solve for x
    x = 4,819,481,228.26/71,386.80
  6. Step 6: Final answer
    x = 67,512.22

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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.