Home / 103,920.30-155,491.20-74,003.70

Finding the Fourth Proportional to 103,920.30, 155,491.20 and 74,003.70

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Solution

The fourth proportional to 103,920.30, 155,491.20 and 74,003.70 is: 110,728.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,920.30 : 155,491.20 = 74,003.70 : x
  2. Step 2: Convert to fraction form
    103,920.30/155,491.20 = 74,003.70/x
  3. Step 3: Cross multiply
    103,920.30x = 155,491.20 × 74,003.70
  4. Step 4: Simplify right side
    103,920.30x = 11,506,924,117.44
  5. Step 5: Solve for x
    x = 11,506,924,117.44/103,920.30
  6. Step 6: Final answer
    x = 110,728.36

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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.