Home / 80,945.10-121,365-38,824.38

Finding the Fourth Proportional to 80,945.10, 121,365 and 38,824.38

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Solution

The fourth proportional to 80,945.10, 121,365 and 38,824.38 is: 58,211.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,945.10 : 121,365 = 38,824.38 : x
  2. Step 2: Convert to fraction form
    80,945.10/121,365 = 38,824.38/x
  3. Step 3: Cross multiply
    80,945.10x = 121,365 × 38,824.38
  4. Step 4: Simplify right side
    80,945.10x = 4,711,920,878.70
  5. Step 5: Solve for x
    x = 4,711,920,878.70/80,945.10
  6. Step 6: Final answer
    x = 58,211.32

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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.