Home / 121,141.56-167,080.68-78,713.76

Finding the Fourth Proportional to 121,141.56, 167,080.68 and 78,713.76

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Solution

The fourth proportional to 121,141.56, 167,080.68 and 78,713.76 is: 108,563.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,141.56 : 167,080.68 = 78,713.76 : x
  2. Step 2: Convert to fraction form
    121,141.56/167,080.68 = 78,713.76/x
  3. Step 3: Cross multiply
    121,141.56x = 167,080.68 × 78,713.76
  4. Step 4: Simplify right side
    121,141.56x = 13,151,548,546.16
  5. Step 5: Solve for x
    x = 13,151,548,546.16/121,141.56
  6. Step 6: Final answer
    x = 108,563.47

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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.