Home / 142,778.90-196,979.45-91,784.75

Finding the Fourth Proportional to 142,778.90, 196,979.45 and 91,784.75

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Solution

The fourth proportional to 142,778.90, 196,979.45 and 91,784.75 is: 126,627.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,778.90 : 196,979.45 = 91,784.75 : x
  2. Step 2: Convert to fraction form
    142,778.90/196,979.45 = 91,784.75/x
  3. Step 3: Cross multiply
    142,778.90x = 196,979.45 × 91,784.75
  4. Step 4: Simplify right side
    142,778.90x = 18,079,708,129.57
  5. Step 5: Solve for x
    x = 18,079,708,129.57/142,778.90
  6. Step 6: Final answer
    x = 126,627.31

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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.