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Finding the Fourth Proportional to 60,320, 90,480 and 20,866.52

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Solution

The fourth proportional to 60,320, 90,480 and 20,866.52 is: 31,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,320 : 90,480 = 20,866.52 : x
  2. Step 2: Convert to fraction form
    60,320/90,480 = 20,866.52/x
  3. Step 3: Cross multiply
    60,320x = 90,480 × 20,866.52
  4. Step 4: Simplify right side
    60,320x = 1,888,002,729.60
  5. Step 5: Solve for x
    x = 1,888,002,729.60/60,320
  6. Step 6: Final answer
    x = 31,299.78

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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.