Home / 102,072.72-140,821.02-75,278.73

Finding the Fourth Proportional to 102,072.72, 140,821.02 and 75,278.73

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Solution

The fourth proportional to 102,072.72, 140,821.02 and 75,278.73 is: 103,855.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,072.72 : 140,821.02 = 75,278.73 : x
  2. Step 2: Convert to fraction form
    102,072.72/140,821.02 = 75,278.73/x
  3. Step 3: Cross multiply
    102,072.72x = 140,821.02 × 75,278.73
  4. Step 4: Simplify right side
    102,072.72x = 10,600,827,542.90
  5. Step 5: Solve for x
    x = 10,600,827,542.90/102,072.72
  6. Step 6: Final answer
    x = 103,855.64

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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.