Home / 305,727.85-458,770.38-128,220

Finding the Fourth Proportional to 305,727.85, 458,770.38 and 128,220

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Solution

The fourth proportional to 305,727.85, 458,770.38 and 128,220 is: 192,404.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,727.85 : 458,770.38 = 128,220 : x
  2. Step 2: Convert to fraction form
    305,727.85/458,770.38 = 128,220/x
  3. Step 3: Cross multiply
    305,727.85x = 458,770.38 × 128,220
  4. Step 4: Simplify right side
    305,727.85x = 58,823,538,123.60
  5. Step 5: Solve for x
    x = 58,823,538,123.60/305,727.85
  6. Step 6: Final answer
    x = 192,404.91

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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.