Home / 100,211.97-138,258.19-57,160.53

Finding the Fourth Proportional to 100,211.97, 138,258.19 and 57,160.53

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Solution

The fourth proportional to 100,211.97, 138,258.19 and 57,160.53 is: 78,861.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,211.97 : 138,258.19 = 57,160.53 : x
  2. Step 2: Convert to fraction form
    100,211.97/138,258.19 = 57,160.53/x
  3. Step 3: Cross multiply
    100,211.97x = 138,258.19 × 57,160.53
  4. Step 4: Simplify right side
    100,211.97x = 7,902,911,274.34
  5. Step 5: Solve for x
    x = 7,902,911,274.34/100,211.97
  6. Step 6: Final answer
    x = 78,861.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.