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Finding the Fourth Proportional to 121,578.80, 167,781.40 and 67,130.80

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Solution

The fourth proportional to 121,578.80, 167,781.40 and 67,130.80 is: 92,641.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,578.80 : 167,781.40 = 67,130.80 : x
  2. Step 2: Convert to fraction form
    121,578.80/167,781.40 = 67,130.80/x
  3. Step 3: Cross multiply
    121,578.80x = 167,781.40 × 67,130.80
  4. Step 4: Simplify right side
    121,578.80x = 11,263,299,607.12
  5. Step 5: Solve for x
    x = 11,263,299,607.12/121,578.80
  6. Step 6: Final answer
    x = 92,641.97

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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.