Home / 147,678.21-221,517.32-81,538.88

Finding the Fourth Proportional to 147,678.21, 221,517.32 and 81,538.88

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Solution

The fourth proportional to 147,678.21, 221,517.32 and 81,538.88 is: 122,308.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,678.21 : 221,517.32 = 81,538.88 : x
  2. Step 2: Convert to fraction form
    147,678.21/221,517.32 = 81,538.88/x
  3. Step 3: Cross multiply
    147,678.21x = 221,517.32 × 81,538.88
  4. Step 4: Simplify right side
    147,678.21x = 18,062,272,658.12
  5. Step 5: Solve for x
    x = 18,062,272,658.12/147,678.21
  6. Step 6: Final answer
    x = 122,308.31

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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.