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Finding the Fourth Proportional to 71,454.60, 98,605.62 and 39,623.76

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Solution

The fourth proportional to 71,454.60, 98,605.62 and 39,623.76 is: 54,679.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,454.60 : 98,605.62 = 39,623.76 : x
  2. Step 2: Convert to fraction form
    71,454.60/98,605.62 = 39,623.76/x
  3. Step 3: Cross multiply
    71,454.60x = 98,605.62 × 39,623.76
  4. Step 4: Simplify right side
    71,454.60x = 3,907,125,421.53
  5. Step 5: Solve for x
    x = 3,907,125,421.53/71,454.60
  6. Step 6: Final answer
    x = 54,679.83

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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.