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Finding the Fourth Proportional to 221,932.56, 306,266.88 and 121,330.56

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Solution

The fourth proportional to 221,932.56, 306,266.88 and 121,330.56 is: 167,436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,932.56 : 306,266.88 = 121,330.56 : x
  2. Step 2: Convert to fraction form
    221,932.56/306,266.88 = 121,330.56/x
  3. Step 3: Cross multiply
    221,932.56x = 306,266.88 × 121,330.56
  4. Step 4: Simplify right side
    221,932.56x = 37,159,532,059.85
  5. Step 5: Solve for x
    x = 37,159,532,059.85/221,932.56
  6. Step 6: Final answer
    x = 167,436.14

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1.5x scale

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.