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Finding the Fourth Proportional to 71,209.48, 98,267.16 and 39,379.72

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Solution

The fourth proportional to 71,209.48, 98,267.16 and 39,379.72 is: 54,342.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,209.48 : 98,267.16 = 39,379.72 : x
  2. Step 2: Convert to fraction form
    71,209.48/98,267.16 = 39,379.72/x
  3. Step 3: Cross multiply
    71,209.48x = 98,267.16 × 39,379.72
  4. Step 4: Simplify right side
    71,209.48x = 3,869,733,246.00
  5. Step 5: Solve for x
    x = 3,869,733,246.00/71,209.48
  6. Step 6: Final answer
    x = 54,342.95

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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.