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Finding the Fourth Proportional to 138,950.29, 191,754.96 and 85,264.97

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Solution

The fourth proportional to 138,950.29, 191,754.96 and 85,264.97 is: 117,667.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,950.29 : 191,754.96 = 85,264.97 : x
  2. Step 2: Convert to fraction form
    138,950.29/191,754.96 = 85,264.97/x
  3. Step 3: Cross multiply
    138,950.29x = 191,754.96 × 85,264.97
  4. Step 4: Simplify right side
    138,950.29x = 16,349,980,911.75
  5. Step 5: Solve for x
    x = 16,349,980,911.75/138,950.29
  6. Step 6: Final answer
    x = 117,667.84

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1.5x scale

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.