Home / 142,043.64-196,020.80-78,383.28

Finding the Fourth Proportional to 142,043.64, 196,020.80 and 78,383.28

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Solution

The fourth proportional to 142,043.64, 196,020.80 and 78,383.28 is: 108,169.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,043.64 : 196,020.80 = 78,383.28 : x
  2. Step 2: Convert to fraction form
    142,043.64/196,020.80 = 78,383.28/x
  3. Step 3: Cross multiply
    142,043.64x = 196,020.80 × 78,383.28
  4. Step 4: Simplify right side
    142,043.64x = 15,364,753,252.22
  5. Step 5: Solve for x
    x = 15,364,753,252.22/142,043.64
  6. Step 6: Final answer
    x = 108,169.24

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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.