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Finding the Fourth Proportional to 80,623.40, 120,959.40 and 43,201.40

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Solution

The fourth proportional to 80,623.40, 120,959.40 and 43,201.40 is: 64,815.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,623.40 : 120,959.40 = 43,201.40 : x
  2. Step 2: Convert to fraction form
    80,623.40/120,959.40 = 43,201.40/x
  3. Step 3: Cross multiply
    80,623.40x = 120,959.40 × 43,201.40
  4. Step 4: Simplify right side
    80,623.40x = 5,225,615,423.16
  5. Step 5: Solve for x
    x = 5,225,615,423.16/80,623.40
  6. Step 6: Final answer
    x = 64,815.12

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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.