Home / 87,638.63-120,938.74-49,400.42

Finding the Fourth Proportional to 87,638.63, 120,938.74 and 49,400.42

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Solution

The fourth proportional to 87,638.63, 120,938.74 and 49,400.42 is: 68,171.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,638.63 : 120,938.74 = 49,400.42 : x
  2. Step 2: Convert to fraction form
    87,638.63/120,938.74 = 49,400.42/x
  3. Step 3: Cross multiply
    87,638.63x = 120,938.74 × 49,400.42
  4. Step 4: Simplify right side
    87,638.63x = 5,974,423,822.08
  5. Step 5: Solve for x
    x = 5,974,423,822.08/87,638.63
  6. Step 6: Final answer
    x = 68,171.13

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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.