Home / 103,819.11-155,728.73-28,939.47

Finding the Fourth Proportional to 103,819.11, 155,728.73 and 28,939.47

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Solution

The fourth proportional to 103,819.11, 155,728.73 and 28,939.47 is: 43,409.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,819.11 : 155,728.73 = 28,939.47 : x
  2. Step 2: Convert to fraction form
    103,819.11/155,728.73 = 28,939.47/x
  3. Step 3: Cross multiply
    103,819.11x = 155,728.73 × 28,939.47
  4. Step 4: Simplify right side
    103,819.11x = 4,506,706,909.97
  5. Step 5: Solve for x
    x = 4,506,706,909.97/103,819.11
  6. Step 6: Final answer
    x = 43,409.22

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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.