Home / 87,547.15-120,815.57-49,821.40

Finding the Fourth Proportional to 87,547.15, 120,815.57 and 49,821.40

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Solution

The fourth proportional to 87,547.15, 120,815.57 and 49,821.40 is: 68,753.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,547.15 : 120,815.57 = 49,821.40 : x
  2. Step 2: Convert to fraction form
    87,547.15/120,815.57 = 49,821.40/x
  3. Step 3: Cross multiply
    87,547.15x = 120,815.57 × 49,821.40
  4. Step 4: Simplify right side
    87,547.15x = 6,019,200,288.05
  5. Step 5: Solve for x
    x = 6,019,200,288.05/87,547.15
  6. Step 6: Final answer
    x = 68,753.81

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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.