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Finding the Fourth Proportional to 98,721.20, 148,103.40 and 48,825.20

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Solution

The fourth proportional to 98,721.20, 148,103.40 and 48,825.20 is: 73,248.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,721.20 : 148,103.40 = 48,825.20 : x
  2. Step 2: Convert to fraction form
    98,721.20/148,103.40 = 48,825.20/x
  3. Step 3: Cross multiply
    98,721.20x = 148,103.40 × 48,825.20
  4. Step 4: Simplify right side
    98,721.20x = 7,231,178,125.68
  5. Step 5: Solve for x
    x = 7,231,178,125.68/98,721.20
  6. Step 6: Final answer
    x = 73,248.48

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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.