Home / 280,828.70-421,243.05-81,155.60

Finding the Fourth Proportional to 280,828.70, 421,243.05 and 81,155.60

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Solution

The fourth proportional to 280,828.70, 421,243.05 and 81,155.60 is: 121,733.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,828.70 : 421,243.05 = 81,155.60 : x
  2. Step 2: Convert to fraction form
    280,828.70/421,243.05 = 81,155.60/x
  3. Step 3: Cross multiply
    280,828.70x = 421,243.05 × 81,155.60
  4. Step 4: Simplify right side
    280,828.70x = 34,186,232,468.58
  5. Step 5: Solve for x
    x = 34,186,232,468.58/280,828.70
  6. Step 6: Final answer
    x = 121,733.40

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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.