Home / 80,837.70-121,256.55-77,727.30

Finding the Fourth Proportional to 80,837.70, 121,256.55 and 77,727.30

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Solution

The fourth proportional to 80,837.70, 121,256.55 and 77,727.30 is: 116,590.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,837.70 : 121,256.55 = 77,727.30 : x
  2. Step 2: Convert to fraction form
    80,837.70/121,256.55 = 77,727.30/x
  3. Step 3: Cross multiply
    80,837.70x = 121,256.55 × 77,727.30
  4. Step 4: Simplify right side
    80,837.70x = 9,424,944,238.82
  5. Step 5: Solve for x
    x = 9,424,944,238.82/80,837.70
  6. Step 6: Final answer
    x = 116,590.95

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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.