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Finding the Fourth Proportional to 134,561, 185,694.18 and 74,945

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Solution

The fourth proportional to 134,561, 185,694.18 and 74,945 is: 103,424.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,561 : 185,694.18 = 74,945 : x
  2. Step 2: Convert to fraction form
    134,561/185,694.18 = 74,945/x
  3. Step 3: Cross multiply
    134,561x = 185,694.18 × 74,945
  4. Step 4: Simplify right side
    134,561x = 13,916,850,320.10
  5. Step 5: Solve for x
    x = 13,916,850,320.10/134,561
  6. Step 6: Final answer
    x = 103,424.10

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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.