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Finding the Fourth Proportional to 121,255.60, 181,883.40 and 103,540.90

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Solution

The fourth proportional to 121,255.60, 181,883.40 and 103,540.90 is: 155,311.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,255.60 : 181,883.40 = 103,540.90 : x
  2. Step 2: Convert to fraction form
    121,255.60/181,883.40 = 103,540.90/x
  3. Step 3: Cross multiply
    121,255.60x = 181,883.40 × 103,540.90
  4. Step 4: Simplify right side
    121,255.60x = 18,832,370,931.06
  5. Step 5: Solve for x
    x = 18,832,370,931.06/121,255.60
  6. Step 6: Final answer
    x = 155,311.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.