Home / 103,778.49-155,706.92-40,643.68

Finding the Fourth Proportional to 103,778.49, 155,706.92 and 40,643.68

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Solution

The fourth proportional to 103,778.49, 155,706.92 and 40,643.68 is: 60,980.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,778.49 : 155,706.92 = 40,643.68 : x
  2. Step 2: Convert to fraction form
    103,778.49/155,706.92 = 40,643.68/x
  3. Step 3: Cross multiply
    103,778.49x = 155,706.92 × 40,643.68
  4. Step 4: Simplify right side
    103,778.49x = 6,328,502,230.27
  5. Step 5: Solve for x
    x = 6,328,502,230.27/103,778.49
  6. Step 6: Final answer
    x = 60,980.87

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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.