Home / 285,845.20-428,767.80-98,875.60

Finding the Fourth Proportional to 285,845.20, 428,767.80 and 98,875.60

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Solution

The fourth proportional to 285,845.20, 428,767.80 and 98,875.60 is: 148,313.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,845.20 : 428,767.80 = 98,875.60 : x
  2. Step 2: Convert to fraction form
    285,845.20/428,767.80 = 98,875.60/x
  3. Step 3: Cross multiply
    285,845.20x = 428,767.80 × 98,875.60
  4. Step 4: Simplify right side
    285,845.20x = 42,394,673,485.68
  5. Step 5: Solve for x
    x = 42,394,673,485.68/285,845.20
  6. Step 6: Final answer
    x = 148,313.40

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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.