Home / 90,845.20-136,138.20-66,966.40

Finding the Fourth Proportional to 90,845.20, 136,138.20 and 66,966.40

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Solution

The fourth proportional to 90,845.20, 136,138.20 and 66,966.40 is: 100,354.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,845.20 : 136,138.20 = 66,966.40 : x
  2. Step 2: Convert to fraction form
    90,845.20/136,138.20 = 66,966.40/x
  3. Step 3: Cross multiply
    90,845.20x = 136,138.20 × 66,966.40
  4. Step 4: Simplify right side
    90,845.20x = 9,116,685,156.48
  5. Step 5: Solve for x
    x = 9,116,685,156.48/90,845.20
  6. Step 6: Final answer
    x = 100,354.07

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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.