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Finding the Fourth Proportional to 172,479.66, 238,014 and 121,512.84

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Solution

The fourth proportional to 172,479.66, 238,014 and 121,512.84 is: 167,682.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,479.66 : 238,014 = 121,512.84 : x
  2. Step 2: Convert to fraction form
    172,479.66/238,014 = 121,512.84/x
  3. Step 3: Cross multiply
    172,479.66x = 238,014 × 121,512.84
  4. Step 4: Simplify right side
    172,479.66x = 28,921,757,099.76
  5. Step 5: Solve for x
    x = 28,921,757,099.76/172,479.66
  6. Step 6: Final answer
    x = 167,682.13

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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.