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Finding the Fourth Proportional to 172,359.72, 237,776.58 and 100,742.76

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Solution

The fourth proportional to 172,359.72, 237,776.58 and 100,742.76 is: 138,978.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,359.72 : 237,776.58 = 100,742.76 : x
  2. Step 2: Convert to fraction form
    172,359.72/237,776.58 = 100,742.76/x
  3. Step 3: Cross multiply
    172,359.72x = 237,776.58 × 100,742.76
  4. Step 4: Simplify right side
    172,359.72x = 23,954,268,932.56
  5. Step 5: Solve for x
    x = 23,954,268,932.56/172,359.72
  6. Step 6: Final answer
    x = 138,978.35

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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.