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Finding the Fourth Proportional to 121,738.56, 168,213.76 and 93,686.56

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Solution

The fourth proportional to 121,738.56, 168,213.76 and 93,686.56 is: 129,452.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,738.56 : 168,213.76 = 93,686.56 : x
  2. Step 2: Convert to fraction form
    121,738.56/168,213.76 = 93,686.56/x
  3. Step 3: Cross multiply
    121,738.56x = 168,213.76 × 93,686.56
  4. Step 4: Simplify right side
    121,738.56x = 15,759,368,519.07
  5. Step 5: Solve for x
    x = 15,759,368,519.07/121,738.56
  6. Step 6: Final answer
    x = 129,452.56

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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.