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Finding the Fourth Proportional to 90,775.90, 136,048.65 and 80,868.70

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Solution

The fourth proportional to 90,775.90, 136,048.65 and 80,868.70 is: 121,200.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,775.90 : 136,048.65 = 80,868.70 : x
  2. Step 2: Convert to fraction form
    90,775.90/136,048.65 = 80,868.70/x
  3. Step 3: Cross multiply
    90,775.90x = 136,048.65 × 80,868.70
  4. Step 4: Simplify right side
    90,775.90x = 11,002,077,462.26
  5. Step 5: Solve for x
    x = 11,002,077,462.26/90,775.90
  6. Step 6: Final answer
    x = 121,200.42

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1.5x scale

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.