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Finding the Fourth Proportional to 212,667.71, 318,700.65 and 117,939.56

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Solution

The fourth proportional to 212,667.71, 318,700.65 and 117,939.56 is: 176,742.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,667.71 : 318,700.65 = 117,939.56 : x
  2. Step 2: Convert to fraction form
    212,667.71/318,700.65 = 117,939.56/x
  3. Step 3: Cross multiply
    212,667.71x = 318,700.65 × 117,939.56
  4. Step 4: Simplify right side
    212,667.71x = 37,587,414,432.71
  5. Step 5: Solve for x
    x = 37,587,414,432.71/212,667.71
  6. Step 6: Final answer
    x = 176,742.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.