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Finding the Fourth Proportional to 103,612.39, 155,418.58 and 68,543.84

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Solution

The fourth proportional to 103,612.39, 155,418.58 and 68,543.84 is: 102,815.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.39 : 155,418.58 = 68,543.84 : x
  2. Step 2: Convert to fraction form
    103,612.39/155,418.58 = 68,543.84/x
  3. Step 3: Cross multiply
    103,612.39x = 155,418.58 × 68,543.84
  4. Step 4: Simplify right side
    103,612.39x = 10,652,986,280.55
  5. Step 5: Solve for x
    x = 10,652,986,280.55/103,612.39
  6. Step 6: Final answer
    x = 102,815.76

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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.