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Finding the Fourth Proportional to 218,307.60, 327,476.52 and 85,143.60

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Solution

The fourth proportional to 218,307.60, 327,476.52 and 85,143.60 is: 127,721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,307.60 : 327,476.52 = 85,143.60 : x
  2. Step 2: Convert to fraction form
    218,307.60/327,476.52 = 85,143.60/x
  3. Step 3: Cross multiply
    218,307.60x = 327,476.52 × 85,143.60
  4. Step 4: Simplify right side
    218,307.60x = 27,882,529,828.27
  5. Step 5: Solve for x
    x = 27,882,529,828.27/218,307.60
  6. Step 6: Final answer
    x = 127,721.30

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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.