Home / 103,618.95-155,428.38-68,550.45

Finding the Fourth Proportional to 103,618.95, 155,428.38 and 68,550.45

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Solution

The fourth proportional to 103,618.95, 155,428.38 and 68,550.45 is: 102,825.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,618.95 : 155,428.38 = 68,550.45 : x
  2. Step 2: Convert to fraction form
    103,618.95/155,428.38 = 68,550.45/x
  3. Step 3: Cross multiply
    103,618.95x = 155,428.38 × 68,550.45
  4. Step 4: Simplify right side
    103,618.95x = 10,654,685,391.77
  5. Step 5: Solve for x
    x = 10,654,685,391.77/103,618.95
  6. Step 6: Final answer
    x = 102,825.65

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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.