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Finding the Fourth Proportional to 85,282.80, 127,924.20 and 57,289.20

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Solution

The fourth proportional to 85,282.80, 127,924.20 and 57,289.20 is: 85,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,282.80 : 127,924.20 = 57,289.20 : x
  2. Step 2: Convert to fraction form
    85,282.80/127,924.20 = 57,289.20/x
  3. Step 3: Cross multiply
    85,282.80x = 127,924.20 × 57,289.20
  4. Step 4: Simplify right side
    85,282.80x = 7,328,675,078.64
  5. Step 5: Solve for x
    x = 7,328,675,078.64/85,282.80
  6. Step 6: Final answer
    x = 85,933.80

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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.