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Finding the Fourth Proportional to 60,111.72, 90,178.92 and 18,549

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Solution

The fourth proportional to 60,111.72, 90,178.92 and 18,549 is: 27,827.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,111.72 : 90,178.92 = 18,549 : x
  2. Step 2: Convert to fraction form
    60,111.72/90,178.92 = 18,549/x
  3. Step 3: Cross multiply
    60,111.72x = 90,178.92 × 18,549
  4. Step 4: Simplify right side
    60,111.72x = 1,672,728,787.08
  5. Step 5: Solve for x
    x = 1,672,728,787.08/60,111.72
  6. Step 6: Final answer
    x = 27,827.00

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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.