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Finding the Fourth Proportional to 80,985.66, 111,725.76 and 50,750.40

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Solution

The fourth proportional to 80,985.66, 111,725.76 and 50,750.40 is: 70,013.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,985.66 : 111,725.76 = 50,750.40 : x
  2. Step 2: Convert to fraction form
    80,985.66/111,725.76 = 50,750.40/x
  3. Step 3: Cross multiply
    80,985.66x = 111,725.76 × 50,750.40
  4. Step 4: Simplify right side
    80,985.66x = 5,670,127,010.30
  5. Step 5: Solve for x
    x = 5,670,127,010.30/80,985.66
  6. Step 6: Final answer
    x = 70,013.96

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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.