Home / 90,865.42-136,320.09-28,535.92

Finding the Fourth Proportional to 90,865.42, 136,320.09 and 28,535.92

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Solution

The fourth proportional to 90,865.42, 136,320.09 and 28,535.92 is: 42,810.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,865.42 : 136,320.09 = 28,535.92 : x
  2. Step 2: Convert to fraction form
    90,865.42/136,320.09 = 28,535.92/x
  3. Step 3: Cross multiply
    90,865.42x = 136,320.09 × 28,535.92
  4. Step 4: Simplify right side
    90,865.42x = 3,890,019,182.63
  5. Step 5: Solve for x
    x = 3,890,019,182.63/90,865.42
  6. Step 6: Final answer
    x = 42,810.78

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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.