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Finding the Fourth Proportional to 285,067.24, 427,669.98 and 85,387.24

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Solution

The fourth proportional to 285,067.24, 427,669.98 and 85,387.24 is: 128,101.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,067.24 : 427,669.98 = 85,387.24 : x
  2. Step 2: Convert to fraction form
    285,067.24/427,669.98 = 85,387.24/x
  3. Step 3: Cross multiply
    285,067.24x = 427,669.98 × 85,387.24
  4. Step 4: Simplify right side
    285,067.24x = 36,517,559,223.06
  5. Step 5: Solve for x
    x = 36,517,559,223.06/285,067.24
  6. Step 6: Final answer
    x = 128,101.56

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1.5x scale

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.