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Finding the Fourth Proportional to 71,719.80, 107,385.30 and 56,167.80

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Solution

The fourth proportional to 71,719.80, 107,385.30 and 56,167.80 is: 84,099.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,719.80 : 107,385.30 = 56,167.80 : x
  2. Step 2: Convert to fraction form
    71,719.80/107,385.30 = 56,167.80/x
  3. Step 3: Cross multiply
    71,719.80x = 107,385.30 × 56,167.80
  4. Step 4: Simplify right side
    71,719.80x = 6,031,596,053.34
  5. Step 5: Solve for x
    x = 6,031,596,053.34/71,719.80
  6. Step 6: Final answer
    x = 84,099.45

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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.