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Finding the Fourth Proportional to 71,189.86, 98,237.13 and 39,358.46

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Solution

The fourth proportional to 71,189.86, 98,237.13 and 39,358.46 is: 54,311.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,189.86 : 98,237.13 = 39,358.46 : x
  2. Step 2: Convert to fraction form
    71,189.86/98,237.13 = 39,358.46/x
  3. Step 3: Cross multiply
    71,189.86x = 98,237.13 × 39,358.46
  4. Step 4: Simplify right side
    71,189.86x = 3,866,462,151.62
  5. Step 5: Solve for x
    x = 3,866,462,151.62/71,189.86
  6. Step 6: Final answer
    x = 54,311.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.