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Finding the Fourth Proportional to 109,920.80, 164,881.20 and 43,363.10

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Solution

The fourth proportional to 109,920.80, 164,881.20 and 43,363.10 is: 65,044.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,920.80 : 164,881.20 = 43,363.10 : x
  2. Step 2: Convert to fraction form
    109,920.80/164,881.20 = 43,363.10/x
  3. Step 3: Cross multiply
    109,920.80x = 164,881.20 × 43,363.10
  4. Step 4: Simplify right side
    109,920.80x = 7,149,759,963.72
  5. Step 5: Solve for x
    x = 7,149,759,963.72/109,920.80
  6. Step 6: Final answer
    x = 65,044.65

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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.