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Finding the Fourth Proportional to 221,778, 306,061.20 and 121,182.48

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Solution

The fourth proportional to 221,778, 306,061.20 and 121,182.48 is: 167,235.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,778 : 306,061.20 = 121,182.48 : x
  2. Step 2: Convert to fraction form
    221,778/306,061.20 = 121,182.48/x
  3. Step 3: Cross multiply
    221,778x = 306,061.20 × 121,182.48
  4. Step 4: Simplify right side
    221,778x = 37,089,255,247.78
  5. Step 5: Solve for x
    x = 37,089,255,247.78/221,778
  6. Step 6: Final answer
    x = 167,235.95

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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.