Home / 80,881.40-121,431.45-51,356.90

Finding the Fourth Proportional to 80,881.40, 121,431.45 and 51,356.90

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Solution

The fourth proportional to 80,881.40, 121,431.45 and 51,356.90 is: 77,104.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,881.40 : 121,431.45 = 51,356.90 : x
  2. Step 2: Convert to fraction form
    80,881.40/121,431.45 = 51,356.90/x
  3. Step 3: Cross multiply
    80,881.40x = 121,431.45 × 51,356.90
  4. Step 4: Simplify right side
    80,881.40x = 6,236,342,834.51
  5. Step 5: Solve for x
    x = 6,236,342,834.51/80,881.40
  6. Step 6: Final answer
    x = 77,104.78

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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.