Home / 280,832.30-421,248.45-81,159.20

Finding the Fourth Proportional to 280,832.30, 421,248.45 and 81,159.20

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Solution

The fourth proportional to 280,832.30, 421,248.45 and 81,159.20 is: 121,738.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,832.30 : 421,248.45 = 81,159.20 : x
  2. Step 2: Convert to fraction form
    280,832.30/421,248.45 = 81,159.20/x
  3. Step 3: Cross multiply
    280,832.30x = 421,248.45 × 81,159.20
  4. Step 4: Simplify right side
    280,832.30x = 34,188,187,203.24
  5. Step 5: Solve for x
    x = 34,188,187,203.24/280,832.30
  6. Step 6: Final answer
    x = 121,738.80

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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.