Home / 280,824.70-421,237.05-81,151.60

Finding the Fourth Proportional to 280,824.70, 421,237.05 and 81,151.60

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Solution

The fourth proportional to 280,824.70, 421,237.05 and 81,151.60 is: 121,727.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,824.70 : 421,237.05 = 81,151.60 : x
  2. Step 2: Convert to fraction form
    280,824.70/421,237.05 = 81,151.60/x
  3. Step 3: Cross multiply
    280,824.70x = 421,237.05 × 81,151.60
  4. Step 4: Simplify right side
    280,824.70x = 34,184,060,586.78
  5. Step 5: Solve for x
    x = 34,184,060,586.78/280,824.70
  6. Step 6: Final answer
    x = 121,727.40

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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.