Home / 142,103.28-196,101.60-78,441.06

Finding the Fourth Proportional to 142,103.28, 196,101.60 and 78,441.06

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Solution

The fourth proportional to 142,103.28, 196,101.60 and 78,441.06 is: 108,248.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,103.28 : 196,101.60 = 78,441.06 : x
  2. Step 2: Convert to fraction form
    142,103.28/196,101.60 = 78,441.06/x
  3. Step 3: Cross multiply
    142,103.28x = 196,101.60 × 78,441.06
  4. Step 4: Simplify right side
    142,103.28x = 15,382,417,371.70
  5. Step 5: Solve for x
    x = 15,382,417,371.70/142,103.28
  6. Step 6: Final answer
    x = 108,248.15

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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.