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Finding the Fourth Proportional to 98,914.92, 148,520.60 and 85,628.89

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Solution

The fourth proportional to 98,914.92, 148,520.60 and 85,628.89 is: 128,571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,914.92 : 148,520.60 = 85,628.89 : x
  2. Step 2: Convert to fraction form
    98,914.92/148,520.60 = 85,628.89/x
  3. Step 3: Cross multiply
    98,914.92x = 148,520.60 × 85,628.89
  4. Step 4: Simplify right side
    98,914.92x = 12,717,654,120.13
  5. Step 5: Solve for x
    x = 12,717,654,120.13/98,914.92
  6. Step 6: Final answer
    x = 128,571.65

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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.