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Finding the Fourth Proportional to 60,561.88, 90,832 and 18,431.74

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Solution

The fourth proportional to 60,561.88, 90,832 and 18,431.74 is: 27,644.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,561.88 : 90,832 = 18,431.74 : x
  2. Step 2: Convert to fraction form
    60,561.88/90,832 = 18,431.74/x
  3. Step 3: Cross multiply
    60,561.88x = 90,832 × 18,431.74
  4. Step 4: Simplify right side
    60,561.88x = 1,674,191,807.68
  5. Step 5: Solve for x
    x = 1,674,191,807.68/60,561.88
  6. Step 6: Final answer
    x = 27,644.32

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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.