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Finding the Fourth Proportional to 80,959.08, 111,810.64 and 61,632.68

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Solution

The fourth proportional to 80,959.08, 111,810.64 and 61,632.68 is: 85,119.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,959.08 : 111,810.64 = 61,632.68 : x
  2. Step 2: Convert to fraction form
    80,959.08/111,810.64 = 61,632.68/x
  3. Step 3: Cross multiply
    80,959.08x = 111,810.64 × 61,632.68
  4. Step 4: Simplify right side
    80,959.08x = 6,891,189,395.72
  5. Step 5: Solve for x
    x = 6,891,189,395.72/80,959.08
  6. Step 6: Final answer
    x = 85,119.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.