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Finding the Fourth Proportional to 60,121.72, 90,193.92 and 18,559

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Solution

The fourth proportional to 60,121.72, 90,193.92 and 18,559 is: 27,842.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,121.72 : 90,193.92 = 18,559 : x
  2. Step 2: Convert to fraction form
    60,121.72/90,193.92 = 18,559/x
  3. Step 3: Cross multiply
    60,121.72x = 90,193.92 × 18,559
  4. Step 4: Simplify right side
    60,121.72x = 1,673,908,961.28
  5. Step 5: Solve for x
    x = 1,673,908,961.28/60,121.72
  6. Step 6: Final answer
    x = 27,842.00

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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.