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Finding the Fourth Proportional to 221,870.84, 306,203.26 and 131,255.94

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Solution

The fourth proportional to 221,870.84, 306,203.26 and 131,255.94 is: 181,145.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,870.84 : 306,203.26 = 131,255.94 : x
  2. Step 2: Convert to fraction form
    221,870.84/306,203.26 = 131,255.94/x
  3. Step 3: Cross multiply
    221,870.84x = 306,203.26 × 131,255.94
  4. Step 4: Simplify right side
    221,870.84x = 40,190,995,738.17
  5. Step 5: Solve for x
    x = 40,190,995,738.17/221,870.84
  6. Step 6: Final answer
    x = 181,145.91

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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.