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Finding the Fourth Proportional to 121,209.76, 167,269 and 67,495.40

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Solution

The fourth proportional to 121,209.76, 167,269 and 67,495.40 is: 93,143.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,209.76 : 167,269 = 67,495.40 : x
  2. Step 2: Convert to fraction form
    121,209.76/167,269 = 67,495.40/x
  3. Step 3: Cross multiply
    121,209.76x = 167,269 × 67,495.40
  4. Step 4: Simplify right side
    121,209.76x = 11,289,888,062.60
  5. Step 5: Solve for x
    x = 11,289,888,062.60/121,209.76
  6. Step 6: Final answer
    x = 93,143.39

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1.5x scale

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.