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Finding the Fourth Proportional to 121,012.16, 166,987.16 and 67,294

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Solution

The fourth proportional to 121,012.16, 166,987.16 and 67,294 is: 92,860.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,012.16 : 166,987.16 = 67,294 : x
  2. Step 2: Convert to fraction form
    121,012.16/166,987.16 = 67,294/x
  3. Step 3: Cross multiply
    121,012.16x = 166,987.16 × 67,294
  4. Step 4: Simplify right side
    121,012.16x = 11,237,233,945.04
  5. Step 5: Solve for x
    x = 11,237,233,945.04/121,012.16
  6. Step 6: Final answer
    x = 92,860.37

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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.