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Finding the Fourth Proportional to 98,129.20, 146,902.20 and 87,631.60

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Solution

The fourth proportional to 98,129.20, 146,902.20 and 87,631.60 is: 131,186.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,129.20 : 146,902.20 = 87,631.60 : x
  2. Step 2: Convert to fraction form
    98,129.20/146,902.20 = 87,631.60/x
  3. Step 3: Cross multiply
    98,129.20x = 146,902.20 × 87,631.60
  4. Step 4: Simplify right side
    98,129.20x = 12,873,274,829.52
  5. Step 5: Solve for x
    x = 12,873,274,829.52/98,129.20
  6. Step 6: Final answer
    x = 131,186.99

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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.