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Finding the Fourth Proportional to 74,020.32, 111,026.16 and 18,612

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Solution

The fourth proportional to 74,020.32, 111,026.16 and 18,612 is: 27,916.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,020.32 : 111,026.16 = 18,612 : x
  2. Step 2: Convert to fraction form
    74,020.32/111,026.16 = 18,612/x
  3. Step 3: Cross multiply
    74,020.32x = 111,026.16 × 18,612
  4. Step 4: Simplify right side
    74,020.32x = 2,066,418,889.92
  5. Step 5: Solve for x
    x = 2,066,418,889.92/74,020.32
  6. Step 6: Final answer
    x = 27,916.91

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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.