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Finding the Fourth Proportional to 121,010.67, 166,981.95 and 67,287.03

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Solution

The fourth proportional to 121,010.67, 166,981.95 and 67,287.03 is: 92,849.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,010.67 : 166,981.95 = 67,287.03 : x
  2. Step 2: Convert to fraction form
    121,010.67/166,981.95 = 67,287.03/x
  3. Step 3: Cross multiply
    121,010.67x = 166,981.95 × 67,287.03
  4. Step 4: Simplify right side
    121,010.67x = 11,235,719,479.11
  5. Step 5: Solve for x
    x = 11,235,719,479.11/121,010.67
  6. Step 6: Final answer
    x = 92,849.00

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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.