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Finding the Fourth Proportional to 91,373.92, 136,991.41 and 63,219.13

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Solution

The fourth proportional to 91,373.92, 136,991.41 and 63,219.13 is: 94,780.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,373.92 : 136,991.41 = 63,219.13 : x
  2. Step 2: Convert to fraction form
    91,373.92/136,991.41 = 63,219.13/x
  3. Step 3: Cross multiply
    91,373.92x = 136,991.41 × 63,219.13
  4. Step 4: Simplify right side
    91,373.92x = 8,660,477,757.67
  5. Step 5: Solve for x
    x = 8,660,477,757.67/91,373.92
  6. Step 6: Final answer
    x = 94,780.63

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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.