Home / 103,418.76-155,128.55-68,350.62

Finding the Fourth Proportional to 103,418.76, 155,128.55 and 68,350.62

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Solution

The fourth proportional to 103,418.76, 155,128.55 and 68,350.62 is: 102,526.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,418.76 : 155,128.55 = 68,350.62 : x
  2. Step 2: Convert to fraction form
    103,418.76/155,128.55 = 68,350.62/x
  3. Step 3: Cross multiply
    103,418.76x = 155,128.55 × 68,350.62
  4. Step 4: Simplify right side
    103,418.76x = 10,603,132,572.20
  5. Step 5: Solve for x
    x = 10,603,132,572.20/103,418.76
  6. Step 6: Final answer
    x = 102,526.20

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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.