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Finding the Fourth Proportional to 171,731, 236,908.14 and 121,457.72

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Solution

The fourth proportional to 171,731, 236,908.14 and 121,457.72 is: 167,554.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,731 : 236,908.14 = 121,457.72 : x
  2. Step 2: Convert to fraction form
    171,731/236,908.14 = 121,457.72/x
  3. Step 3: Cross multiply
    171,731x = 236,908.14 × 121,457.72
  4. Step 4: Simplify right side
    171,731x = 28,774,322,533.84
  5. Step 5: Solve for x
    x = 28,774,322,533.84/171,731
  6. Step 6: Final answer
    x = 167,554.62

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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.