Home / 142,091.11-196,071.75-78,424.78

Finding the Fourth Proportional to 142,091.11, 196,071.75 and 78,424.78

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Solution

The fourth proportional to 142,091.11, 196,071.75 and 78,424.78 is: 108,218.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,091.11 : 196,071.75 = 78,424.78 : x
  2. Step 2: Convert to fraction form
    142,091.11/196,071.75 = 78,424.78/x
  3. Step 3: Cross multiply
    142,091.11x = 196,071.75 × 78,424.78
  4. Step 4: Simplify right side
    142,091.11x = 15,376,883,857.97
  5. Step 5: Solve for x
    x = 15,376,883,857.97/142,091.11
  6. Step 6: Final answer
    x = 108,218.48

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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.