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Finding the Fourth Proportional to 71,147.70, 98,178.84 and 39,317.76

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Solution

The fourth proportional to 71,147.70, 98,178.84 and 39,317.76 is: 54,255.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,147.70 : 98,178.84 = 39,317.76 : x
  2. Step 2: Convert to fraction form
    71,147.70/98,178.84 = 39,317.76/x
  3. Step 3: Cross multiply
    71,147.70x = 98,178.84 × 39,317.76
  4. Step 4: Simplify right side
    71,147.70x = 3,860,172,068.20
  5. Step 5: Solve for x
    x = 3,860,172,068.20/71,147.70
  6. Step 6: Final answer
    x = 54,255.75

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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.