Home / 81,445.72-112,395.12-49,614.61

Finding the Fourth Proportional to 81,445.72, 112,395.12 and 49,614.61

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Solution

The fourth proportional to 81,445.72, 112,395.12 and 49,614.61 is: 68,468.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,445.72 : 112,395.12 = 49,614.61 : x
  2. Step 2: Convert to fraction form
    81,445.72/112,395.12 = 49,614.61/x
  3. Step 3: Cross multiply
    81,445.72x = 112,395.12 × 49,614.61
  4. Step 4: Simplify right side
    81,445.72x = 5,576,440,402.11
  5. Step 5: Solve for x
    x = 5,576,440,402.11/81,445.72
  6. Step 6: Final answer
    x = 68,468.19

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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.