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Finding the Fourth Proportional to 71,575.80, 107,363.70 and 42,051.30

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Solution

The fourth proportional to 71,575.80, 107,363.70 and 42,051.30 is: 63,076.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,575.80 : 107,363.70 = 42,051.30 : x
  2. Step 2: Convert to fraction form
    71,575.80/107,363.70 = 42,051.30/x
  3. Step 3: Cross multiply
    71,575.80x = 107,363.70 × 42,051.30
  4. Step 4: Simplify right side
    71,575.80x = 4,514,783,157.81
  5. Step 5: Solve for x
    x = 4,514,783,157.81/71,575.80
  6. Step 6: Final answer
    x = 63,076.95

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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.