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Finding the Fourth Proportional to 85,215.60, 127,823.40 and 54,188.40

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Solution

The fourth proportional to 85,215.60, 127,823.40 and 54,188.40 is: 81,282.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,215.60 : 127,823.40 = 54,188.40 : x
  2. Step 2: Convert to fraction form
    85,215.60/127,823.40 = 54,188.40/x
  3. Step 3: Cross multiply
    85,215.60x = 127,823.40 × 54,188.40
  4. Step 4: Simplify right side
    85,215.60x = 6,926,545,528.56
  5. Step 5: Solve for x
    x = 6,926,545,528.56/85,215.60
  6. Step 6: Final answer
    x = 81,282.60

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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.