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Finding the Fourth Proportional to 121,102.19, 167,167.52 and 90,974.90

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Solution

The fourth proportional to 121,102.19, 167,167.52 and 90,974.90 is: 125,580.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,102.19 : 167,167.52 = 90,974.90 : x
  2. Step 2: Convert to fraction form
    121,102.19/167,167.52 = 90,974.90/x
  3. Step 3: Cross multiply
    121,102.19x = 167,167.52 × 90,974.90
  4. Step 4: Simplify right side
    121,102.19x = 15,208,048,035.00
  5. Step 5: Solve for x
    x = 15,208,048,035.00/121,102.19
  6. Step 6: Final answer
    x = 125,580.29

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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.