Home / 280,956.40-421,382.28-81,227.38

Finding the Fourth Proportional to 280,956.40, 421,382.28 and 81,227.38

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Solution

The fourth proportional to 280,956.40, 421,382.28 and 81,227.38 is: 121,825.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,956.40 : 421,382.28 = 81,227.38 : x
  2. Step 2: Convert to fraction form
    280,956.40/421,382.28 = 81,227.38/x
  3. Step 3: Cross multiply
    280,956.40x = 421,382.28 × 81,227.38
  4. Step 4: Simplify right side
    280,956.40x = 34,227,778,582.83
  5. Step 5: Solve for x
    x = 34,227,778,582.83/280,956.40
  6. Step 6: Final answer
    x = 121,825.94

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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.