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Finding the Fourth Proportional to 103,612.38, 155,418.60 and 28,751.40

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Solution

The fourth proportional to 103,612.38, 155,418.60 and 28,751.40 is: 43,127.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.38 : 155,418.60 = 28,751.40 : x
  2. Step 2: Convert to fraction form
    103,612.38/155,418.60 = 28,751.40/x
  3. Step 3: Cross multiply
    103,612.38x = 155,418.60 × 28,751.40
  4. Step 4: Simplify right side
    103,612.38x = 4,468,502,336.04
  5. Step 5: Solve for x
    x = 4,468,502,336.04/103,612.38
  6. Step 6: Final answer
    x = 43,127.11

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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.