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Finding the Fourth Proportional to 81,934.20, 122,901.30 and 29,345.40

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Solution

The fourth proportional to 81,934.20, 122,901.30 and 29,345.40 is: 44,018.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,934.20 : 122,901.30 = 29,345.40 : x
  2. Step 2: Convert to fraction form
    81,934.20/122,901.30 = 29,345.40/x
  3. Step 3: Cross multiply
    81,934.20x = 122,901.30 × 29,345.40
  4. Step 4: Simplify right side
    81,934.20x = 3,606,587,809.02
  5. Step 5: Solve for x
    x = 3,606,587,809.02/81,934.20
  6. Step 6: Final answer
    x = 44,018.10

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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.