Home / 80,781.40-121,157.70-51,146.20

Finding the Fourth Proportional to 80,781.40, 121,157.70 and 51,146.20

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Solution

The fourth proportional to 80,781.40, 121,157.70 and 51,146.20 is: 76,710.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,781.40 : 121,157.70 = 51,146.20 : x
  2. Step 2: Convert to fraction form
    80,781.40/121,157.70 = 51,146.20/x
  3. Step 3: Cross multiply
    80,781.40x = 121,157.70 × 51,146.20
  4. Step 4: Simplify right side
    80,781.40x = 6,196,755,955.74
  5. Step 5: Solve for x
    x = 6,196,755,955.74/80,781.40
  6. Step 6: Final answer
    x = 76,710.18

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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.