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Finding the Fourth Proportional to 71,609.50, 98,821.39 and 39,346.74

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Solution

The fourth proportional to 71,609.50, 98,821.39 and 39,346.74 is: 54,298.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,609.50 : 98,821.39 = 39,346.74 : x
  2. Step 2: Convert to fraction form
    71,609.50/98,821.39 = 39,346.74/x
  3. Step 3: Cross multiply
    71,609.50x = 98,821.39 × 39,346.74
  4. Step 4: Simplify right side
    71,609.50x = 3,888,299,346.90
  5. Step 5: Solve for x
    x = 3,888,299,346.90/71,609.50
  6. Step 6: Final answer
    x = 54,298.65

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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.