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Finding the Fourth Proportional to 74,520, 111,758.13 and 21,916.98

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Solution

The fourth proportional to 74,520, 111,758.13 and 21,916.98 is: 32,869.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,520 : 111,758.13 = 21,916.98 : x
  2. Step 2: Convert to fraction form
    74,520/111,758.13 = 21,916.98/x
  3. Step 3: Cross multiply
    74,520x = 111,758.13 × 21,916.98
  4. Step 4: Simplify right side
    74,520x = 2,449,400,700.05
  5. Step 5: Solve for x
    x = 2,449,400,700.05/74,520
  6. Step 6: Final answer
    x = 32,869.04

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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.