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Finding the Fourth Proportional to 71,118.60, 106,677.21 and 28,988.79

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Solution

The fourth proportional to 71,118.60, 106,677.21 and 28,988.79 is: 43,482.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,118.60 : 106,677.21 = 28,988.79 : x
  2. Step 2: Convert to fraction form
    71,118.60/106,677.21 = 28,988.79/x
  3. Step 3: Cross multiply
    71,118.60x = 106,677.21 × 28,988.79
  4. Step 4: Simplify right side
    71,118.60x = 3,092,443,238.48
  5. Step 5: Solve for x
    x = 3,092,443,238.48/71,118.60
  6. Step 6: Final answer
    x = 43,482.90

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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.