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Finding the Fourth Proportional to 172,231.68, 237,719.70 and 108,656.40

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Solution

The fourth proportional to 172,231.68, 237,719.70 and 108,656.40 is: 149,971.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,231.68 : 237,719.70 = 108,656.40 : x
  2. Step 2: Convert to fraction form
    172,231.68/237,719.70 = 108,656.40/x
  3. Step 3: Cross multiply
    172,231.68x = 237,719.70 × 108,656.40
  4. Step 4: Simplify right side
    172,231.68x = 25,829,766,811.08
  5. Step 5: Solve for x
    x = 25,829,766,811.08/172,231.68
  6. Step 6: Final answer
    x = 149,971.06

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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.