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Finding the Fourth Proportional to 81,393.35, 122,277.14 and 57,432.80

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Solution

The fourth proportional to 81,393.35, 122,277.14 and 57,432.80 is: 86,281.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,393.35 : 122,277.14 = 57,432.80 : x
  2. Step 2: Convert to fraction form
    81,393.35/122,277.14 = 57,432.80/x
  3. Step 3: Cross multiply
    81,393.35x = 122,277.14 × 57,432.80
  4. Step 4: Simplify right side
    81,393.35x = 7,022,717,627.64
  5. Step 5: Solve for x
    x = 7,022,717,627.64/81,393.35
  6. Step 6: Final answer
    x = 86,281.23

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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.