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Finding the Fourth Proportional to 98,380.48, 135,809.04 and 66,645.76

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Solution

The fourth proportional to 98,380.48, 135,809.04 and 66,645.76 is: 92,000.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,380.48 : 135,809.04 = 66,645.76 : x
  2. Step 2: Convert to fraction form
    98,380.48/135,809.04 = 66,645.76/x
  3. Step 3: Cross multiply
    98,380.48x = 135,809.04 × 66,645.76
  4. Step 4: Simplify right side
    98,380.48x = 9,051,096,685.67
  5. Step 5: Solve for x
    x = 9,051,096,685.67/98,380.48
  6. Step 6: Final answer
    x = 92,000.94

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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.