Home / 280,829.70-421,244.55-81,156.60

Finding the Fourth Proportional to 280,829.70, 421,244.55 and 81,156.60

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Solution

The fourth proportional to 280,829.70, 421,244.55 and 81,156.60 is: 121,734.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,829.70 : 421,244.55 = 81,156.60 : x
  2. Step 2: Convert to fraction form
    280,829.70/421,244.55 = 81,156.60/x
  3. Step 3: Cross multiply
    280,829.70x = 421,244.55 × 81,156.60
  4. Step 4: Simplify right side
    280,829.70x = 34,186,775,446.53
  5. Step 5: Solve for x
    x = 34,186,775,446.53/280,829.70
  6. Step 6: Final answer
    x = 121,734.90

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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.