Home / 280,832.40-421,248.60-81,159.30

Finding the Fourth Proportional to 280,832.40, 421,248.60 and 81,159.30

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Solution

The fourth proportional to 280,832.40, 421,248.60 and 81,159.30 is: 121,738.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,832.40 : 421,248.60 = 81,159.30 : x
  2. Step 2: Convert to fraction form
    280,832.40/421,248.60 = 81,159.30/x
  3. Step 3: Cross multiply
    280,832.40x = 421,248.60 × 81,159.30
  4. Step 4: Simplify right side
    280,832.40x = 34,188,241,501.98
  5. Step 5: Solve for x
    x = 34,188,241,501.98/280,832.40
  6. Step 6: Final answer
    x = 121,738.95

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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.