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Finding the Fourth Proportional to 272,365.38, 408,613.73 and 85,376.88

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Solution

The fourth proportional to 272,365.38, 408,613.73 and 85,376.88 is: 128,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,365.38 : 408,613.73 = 85,376.88 : x
  2. Step 2: Convert to fraction form
    272,365.38/408,613.73 = 85,376.88/x
  3. Step 3: Cross multiply
    272,365.38x = 408,613.73 × 85,376.88
  4. Step 4: Simplify right side
    272,365.38x = 34,886,164,965.68
  5. Step 5: Solve for x
    x = 34,886,164,965.68/272,365.38
  6. Step 6: Final answer
    x = 128,085.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.