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Finding the Fourth Proportional to 121,602.40, 167,791.30 and 67,878.74

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Solution

The fourth proportional to 121,602.40, 167,791.30 and 67,878.74 is: 93,661.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,602.40 : 167,791.30 = 67,878.74 : x
  2. Step 2: Convert to fraction form
    121,602.40/167,791.30 = 67,878.74/x
  3. Step 3: Cross multiply
    121,602.40x = 167,791.30 × 67,878.74
  4. Step 4: Simplify right side
    121,602.40x = 11,389,462,276.74
  5. Step 5: Solve for x
    x = 11,389,462,276.74/121,602.40
  6. Step 6: Final answer
    x = 93,661.49

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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.