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Finding the Fourth Proportional to 218,599.60, 327,899.40 and 78,516.40

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Solution

The fourth proportional to 218,599.60, 327,899.40 and 78,516.40 is: 117,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,599.60 : 327,899.40 = 78,516.40 : x
  2. Step 2: Convert to fraction form
    218,599.60/327,899.40 = 78,516.40/x
  3. Step 3: Cross multiply
    218,599.60x = 327,899.40 × 78,516.40
  4. Step 4: Simplify right side
    218,599.60x = 25,745,480,450.16
  5. Step 5: Solve for x
    x = 25,745,480,450.16/218,599.60
  6. Step 6: Final answer
    x = 117,774.60

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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.