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Finding the Fourth Proportional to 121,279.60, 181,919.40 and 74,558.80

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Solution

The fourth proportional to 121,279.60, 181,919.40 and 74,558.80 is: 111,838.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,279.60 : 181,919.40 = 74,558.80 : x
  2. Step 2: Convert to fraction form
    121,279.60/181,919.40 = 74,558.80/x
  3. Step 3: Cross multiply
    121,279.60x = 181,919.40 × 74,558.80
  4. Step 4: Simplify right side
    121,279.60x = 13,563,692,160.72
  5. Step 5: Solve for x
    x = 13,563,692,160.72/121,279.60
  6. Step 6: Final answer
    x = 111,838.20

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1.5x scale

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.