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Finding the Fourth Proportional to 60,358.78, 90,538.20 and 18,805.78

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Solution

The fourth proportional to 60,358.78, 90,538.20 and 18,805.78 is: 28,208.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,358.78 : 90,538.20 = 18,805.78 : x
  2. Step 2: Convert to fraction form
    60,358.78/90,538.20 = 18,805.78/x
  3. Step 3: Cross multiply
    60,358.78x = 90,538.20 × 18,805.78
  4. Step 4: Simplify right side
    60,358.78x = 1,702,641,470.80
  5. Step 5: Solve for x
    x = 1,702,641,470.80/60,358.78
  6. Step 6: Final answer
    x = 28,208.68

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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.