Home / 90,786.17-136,201.12-28,456.67

Finding the Fourth Proportional to 90,786.17, 136,201.12 and 28,456.67

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Solution

The fourth proportional to 90,786.17, 136,201.12 and 28,456.67 is: 42,691.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,786.17 : 136,201.12 = 28,456.67 : x
  2. Step 2: Convert to fraction form
    90,786.17/136,201.12 = 28,456.67/x
  3. Step 3: Cross multiply
    90,786.17x = 136,201.12 × 28,456.67
  4. Step 4: Simplify right side
    90,786.17x = 3,875,829,828.70
  5. Step 5: Solve for x
    x = 3,875,829,828.70/90,786.17
  6. Step 6: Final answer
    x = 42,691.85

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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.