Home / 81,442.67-122,134.05-28,121.13

Finding the Fourth Proportional to 81,442.67, 122,134.05 and 28,121.13

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Solution

The fourth proportional to 81,442.67, 122,134.05 and 28,121.13 is: 42,171.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,442.67 : 122,134.05 = 28,121.13 : x
  2. Step 2: Convert to fraction form
    81,442.67/122,134.05 = 28,121.13/x
  3. Step 3: Cross multiply
    81,442.67x = 122,134.05 × 28,121.13
  4. Step 4: Simplify right side
    81,442.67x = 3,434,547,497.48
  5. Step 5: Solve for x
    x = 3,434,547,497.48/81,442.67
  6. Step 6: Final answer
    x = 42,171.35

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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.