Home / 87,285.78-120,491.01-76,788.18

Finding the Fourth Proportional to 87,285.78, 120,491.01 and 76,788.18

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Solution

The fourth proportional to 87,285.78, 120,491.01 and 76,788.18 is: 105,999.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,285.78 : 120,491.01 = 76,788.18 : x
  2. Step 2: Convert to fraction form
    87,285.78/120,491.01 = 76,788.18/x
  3. Step 3: Cross multiply
    87,285.78x = 120,491.01 × 76,788.18
  4. Step 4: Simplify right side
    87,285.78x = 9,252,285,364.26
  5. Step 5: Solve for x
    x = 9,252,285,364.26/87,285.78
  6. Step 6: Final answer
    x = 105,999.92

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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.