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Finding the Fourth Proportional to 221,915.66, 306,300.57 and 136,983.92

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Solution

The fourth proportional to 221,915.66, 306,300.57 and 136,983.92 is: 189,072.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,915.66 : 306,300.57 = 136,983.92 : x
  2. Step 2: Convert to fraction form
    221,915.66/306,300.57 = 136,983.92/x
  3. Step 3: Cross multiply
    221,915.66x = 306,300.57 × 136,983.92
  4. Step 4: Simplify right side
    221,915.66x = 41,958,252,776.83
  5. Step 5: Solve for x
    x = 41,958,252,776.83/221,915.66
  6. Step 6: Final answer
    x = 189,072.97

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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.