Home / 80,853.40-121,301.70-72,148.60

Finding the Fourth Proportional to 80,853.40, 121,301.70 and 72,148.60

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Solution

The fourth proportional to 80,853.40, 121,301.70 and 72,148.60 is: 108,242.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,853.40 : 121,301.70 = 72,148.60 : x
  2. Step 2: Convert to fraction form
    80,853.40/121,301.70 = 72,148.60/x
  3. Step 3: Cross multiply
    80,853.40x = 121,301.70 × 72,148.60
  4. Step 4: Simplify right side
    80,853.40x = 8,751,747,832.62
  5. Step 5: Solve for x
    x = 8,751,747,832.62/80,853.40
  6. Step 6: Final answer
    x = 108,242.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.