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Finding the Fourth Proportional to 103,450.80, 155,176.20 and 98,639.40

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Solution

The fourth proportional to 103,450.80, 155,176.20 and 98,639.40 is: 147,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,450.80 : 155,176.20 = 98,639.40 : x
  2. Step 2: Convert to fraction form
    103,450.80/155,176.20 = 98,639.40/x
  3. Step 3: Cross multiply
    103,450.80x = 155,176.20 × 98,639.40
  4. Step 4: Simplify right side
    103,450.80x = 15,306,487,262.28
  5. Step 5: Solve for x
    x = 15,306,487,262.28/103,450.80
  6. Step 6: Final answer
    x = 147,959.10

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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.