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Finding the Fourth Proportional to 98,648.20, 147,972.30 and 72,404.20

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Solution

The fourth proportional to 98,648.20, 147,972.30 and 72,404.20 is: 108,606.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,648.20 : 147,972.30 = 72,404.20 : x
  2. Step 2: Convert to fraction form
    98,648.20/147,972.30 = 72,404.20/x
  3. Step 3: Cross multiply
    98,648.20x = 147,972.30 × 72,404.20
  4. Step 4: Simplify right side
    98,648.20x = 10,713,816,003.66
  5. Step 5: Solve for x
    x = 10,713,816,003.66/98,648.20
  6. Step 6: Final answer
    x = 108,606.30

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1.5x scale

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.