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Finding the Fourth Proportional to 64,823.80, 89,456.90 and 35,015.80

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Solution

The fourth proportional to 64,823.80, 89,456.90 and 35,015.80 is: 48,321.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,823.80 : 89,456.90 = 35,015.80 : x
  2. Step 2: Convert to fraction form
    64,823.80/89,456.90 = 35,015.80/x
  3. Step 3: Cross multiply
    64,823.80x = 89,456.90 × 35,015.80
  4. Step 4: Simplify right side
    64,823.80x = 3,132,404,919.02
  5. Step 5: Solve for x
    x = 3,132,404,919.02/64,823.80
  6. Step 6: Final answer
    x = 48,321.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.