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Finding the Fourth Proportional to 221,653.64, 305,806.18 and 126,136.44

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Solution

The fourth proportional to 221,653.64, 305,806.18 and 126,136.44 is: 174,025.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,653.64 : 305,806.18 = 126,136.44 : x
  2. Step 2: Convert to fraction form
    221,653.64/305,806.18 = 126,136.44/x
  3. Step 3: Cross multiply
    221,653.64x = 305,806.18 × 126,136.44
  4. Step 4: Simplify right side
    221,653.64x = 38,573,302,875.20
  5. Step 5: Solve for x
    x = 38,573,302,875.20/221,653.64
  6. Step 6: Final answer
    x = 174,025.13

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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.