Home / 83,721.10-125,581.65-54,172.30

Finding the Fourth Proportional to 83,721.10, 125,581.65 and 54,172.30

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Solution

The fourth proportional to 83,721.10, 125,581.65 and 54,172.30 is: 81,258.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,721.10 : 125,581.65 = 54,172.30 : x
  2. Step 2: Convert to fraction form
    83,721.10/125,581.65 = 54,172.30/x
  3. Step 3: Cross multiply
    83,721.10x = 125,581.65 × 54,172.30
  4. Step 4: Simplify right side
    83,721.10x = 6,803,046,818.30
  5. Step 5: Solve for x
    x = 6,803,046,818.30/83,721.10
  6. Step 6: Final answer
    x = 81,258.45

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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.