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Finding the Fourth Proportional to 90,826.80, 136,045.80 and 75,274.80

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Solution

The fourth proportional to 90,826.80, 136,045.80 and 75,274.80 is: 112,751.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,826.80 : 136,045.80 = 75,274.80 : x
  2. Step 2: Convert to fraction form
    90,826.80/136,045.80 = 75,274.80/x
  3. Step 3: Cross multiply
    90,826.80x = 136,045.80 × 75,274.80
  4. Step 4: Simplify right side
    90,826.80x = 10,240,820,385.84
  5. Step 5: Solve for x
    x = 10,240,820,385.84/90,826.80
  6. Step 6: Final answer
    x = 112,751.09

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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.