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Finding the Fourth Proportional to 221,915.52, 306,243 and 121,313.52

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Solution

The fourth proportional to 221,915.52, 306,243 and 121,313.52 is: 167,412.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,915.52 : 306,243 = 121,313.52 : x
  2. Step 2: Convert to fraction form
    221,915.52/306,243 = 121,313.52/x
  3. Step 3: Cross multiply
    221,915.52x = 306,243 × 121,313.52
  4. Step 4: Simplify right side
    221,915.52x = 37,151,416,305.36
  5. Step 5: Solve for x
    x = 37,151,416,305.36/221,915.52
  6. Step 6: Final answer
    x = 167,412.43

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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.