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Finding the Fourth Proportional to 91,357.60, 126,082.56 and 53,631.04

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Solution

The fourth proportional to 91,357.60, 126,082.56 and 53,631.04 is: 74,016.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,357.60 : 126,082.56 = 53,631.04 : x
  2. Step 2: Convert to fraction form
    91,357.60/126,082.56 = 53,631.04/x
  3. Step 3: Cross multiply
    91,357.60x = 126,082.56 × 53,631.04
  4. Step 4: Simplify right side
    91,357.60x = 6,761,938,818.66
  5. Step 5: Solve for x
    x = 6,761,938,818.66/91,357.60
  6. Step 6: Final answer
    x = 74,016.16

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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.