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Finding the Fourth Proportional to 91,081.92, 136,628.80 and 38,484.48

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Solution

The fourth proportional to 91,081.92, 136,628.80 and 38,484.48 is: 57,729.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,081.92 : 136,628.80 = 38,484.48 : x
  2. Step 2: Convert to fraction form
    91,081.92/136,628.80 = 38,484.48/x
  3. Step 3: Cross multiply
    91,081.92x = 136,628.80 × 38,484.48
  4. Step 4: Simplify right side
    91,081.92x = 5,258,088,321.02
  5. Step 5: Solve for x
    x = 5,258,088,321.02/91,081.92
  6. Step 6: Final answer
    x = 57,729.22

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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.