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Finding the Fourth Proportional to 86,445.64, 129,668.48 and 27,285.92

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Solution

The fourth proportional to 86,445.64, 129,668.48 and 27,285.92 is: 40,928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,445.64 : 129,668.48 = 27,285.92 : x
  2. Step 2: Convert to fraction form
    86,445.64/129,668.48 = 27,285.92/x
  3. Step 3: Cross multiply
    86,445.64x = 129,668.48 × 27,285.92
  4. Step 4: Simplify right side
    86,445.64x = 3,538,123,771.80
  5. Step 5: Solve for x
    x = 3,538,123,771.80/86,445.64
  6. Step 6: Final answer
    x = 40,928.89

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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.