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Finding the Fourth Proportional to 171,628.32, 256,044.84 and 143,721.12

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Solution

The fourth proportional to 171,628.32, 256,044.84 and 143,721.12 is: 214,411.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,628.32 : 256,044.84 = 143,721.12 : x
  2. Step 2: Convert to fraction form
    171,628.32/256,044.84 = 143,721.12/x
  3. Step 3: Cross multiply
    171,628.32x = 256,044.84 × 143,721.12
  4. Step 4: Simplify right side
    171,628.32x = 36,799,051,175.02
  5. Step 5: Solve for x
    x = 36,799,051,175.02/171,628.32
  6. Step 6: Final answer
    x = 214,411.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.