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Finding the Fourth Proportional to 99,612.51, 149,431.73 and 36,422.79

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Solution

The fourth proportional to 99,612.51, 149,431.73 and 36,422.79 is: 54,638.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,612.51 : 149,431.73 = 36,422.79 : x
  2. Step 2: Convert to fraction form
    99,612.51/149,431.73 = 36,422.79/x
  3. Step 3: Cross multiply
    99,612.51x = 149,431.73 × 36,422.79
  4. Step 4: Simplify right side
    99,612.51x = 5,442,720,339.01
  5. Step 5: Solve for x
    x = 5,442,720,339.01/99,612.51
  6. Step 6: Final answer
    x = 54,638.92

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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.