Home / 142,101.12-196,104.48-78,441.28

Finding the Fourth Proportional to 142,101.12, 196,104.48 and 78,441.28

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Solution

The fourth proportional to 142,101.12, 196,104.48 and 78,441.28 is: 108,251.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,101.12 : 196,104.48 = 78,441.28 : x
  2. Step 2: Convert to fraction form
    142,101.12/196,104.48 = 78,441.28/x
  3. Step 3: Cross multiply
    142,101.12x = 196,104.48 × 78,441.28
  4. Step 4: Simplify right side
    142,101.12x = 15,382,686,424.93
  5. Step 5: Solve for x
    x = 15,382,686,424.93/142,101.12
  6. Step 6: Final answer
    x = 108,251.69

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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.