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Finding the Fourth Proportional to 103,342.10, 155,013.15 and 67,912.70

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Solution

The fourth proportional to 103,342.10, 155,013.15 and 67,912.70 is: 101,869.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,342.10 : 155,013.15 = 67,912.70 : x
  2. Step 2: Convert to fraction form
    103,342.10/155,013.15 = 67,912.70/x
  3. Step 3: Cross multiply
    103,342.10x = 155,013.15 × 67,912.70
  4. Step 4: Simplify right side
    103,342.10x = 10,527,361,552.01
  5. Step 5: Solve for x
    x = 10,527,361,552.01/103,342.10
  6. Step 6: Final answer
    x = 101,869.05

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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.