Home / 90,862.12-136,081.50-87,709.24

Finding the Fourth Proportional to 90,862.12, 136,081.50 and 87,709.24

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Solution

The fourth proportional to 90,862.12, 136,081.50 and 87,709.24 is: 131,359.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,862.12 : 136,081.50 = 87,709.24 : x
  2. Step 2: Convert to fraction form
    90,862.12/136,081.50 = 87,709.24/x
  3. Step 3: Cross multiply
    90,862.12x = 136,081.50 × 87,709.24
  4. Step 4: Simplify right side
    90,862.12x = 11,935,604,943.06
  5. Step 5: Solve for x
    x = 11,935,604,943.06/90,862.12
  6. Step 6: Final answer
    x = 131,359.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.