Home / 80,531.78-111,139-44,721.79

Finding the Fourth Proportional to 80,531.78, 111,139 and 44,721.79

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Solution

The fourth proportional to 80,531.78, 111,139 and 44,721.79 is: 61,718.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,531.78 : 111,139 = 44,721.79 : x
  2. Step 2: Convert to fraction form
    80,531.78/111,139 = 44,721.79/x
  3. Step 3: Cross multiply
    80,531.78x = 111,139 × 44,721.79
  4. Step 4: Simplify right side
    80,531.78x = 4,970,335,018.81
  5. Step 5: Solve for x
    x = 4,970,335,018.81/80,531.78
  6. Step 6: Final answer
    x = 61,718.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.