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Finding the Fourth Proportional to 121,245.30, 181,867.95 and 101,999.70

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Solution

The fourth proportional to 121,245.30, 181,867.95 and 101,999.70 is: 152,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,245.30 : 181,867.95 = 101,999.70 : x
  2. Step 2: Convert to fraction form
    121,245.30/181,867.95 = 101,999.70/x
  3. Step 3: Cross multiply
    121,245.30x = 181,867.95 × 101,999.70
  4. Step 4: Simplify right side
    121,245.30x = 18,550,476,339.62
  5. Step 5: Solve for x
    x = 18,550,476,339.62/121,245.30
  6. Step 6: Final answer
    x = 152,999.55

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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.