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Finding the Fourth Proportional to 129,008.60, 193,512.90 and 121,232.60

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Solution

The fourth proportional to 129,008.60, 193,512.90 and 121,232.60 is: 181,848.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,008.60 : 193,512.90 = 121,232.60 : x
  2. Step 2: Convert to fraction form
    129,008.60/193,512.90 = 121,232.60/x
  3. Step 3: Cross multiply
    129,008.60x = 193,512.90 × 121,232.60
  4. Step 4: Simplify right side
    129,008.60x = 23,460,072,000.54
  5. Step 5: Solve for x
    x = 23,460,072,000.54/129,008.60
  6. Step 6: Final answer
    x = 181,848.90

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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.