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Finding the Fourth Proportional to 134,642.87, 185,808.44 and 74,215.86

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Solution

The fourth proportional to 134,642.87, 185,808.44 and 74,215.86 is: 102,418.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,642.87 : 185,808.44 = 74,215.86 : x
  2. Step 2: Convert to fraction form
    134,642.87/185,808.44 = 74,215.86/x
  3. Step 3: Cross multiply
    134,642.87x = 185,808.44 × 74,215.86
  4. Step 4: Simplify right side
    134,642.87x = 13,789,933,355.40
  5. Step 5: Solve for x
    x = 13,789,933,355.40/134,642.87
  6. Step 6: Final answer
    x = 102,418.59

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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.