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Finding the Fourth Proportional to 228,318.28, 342,392.28 and 78,516.16

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Solution

The fourth proportional to 228,318.28, 342,392.28 and 78,516.16 is: 117,744.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,318.28 : 342,392.28 = 78,516.16 : x
  2. Step 2: Convert to fraction form
    228,318.28/342,392.28 = 78,516.16/x
  3. Step 3: Cross multiply
    228,318.28x = 342,392.28 × 78,516.16
  4. Step 4: Simplify right side
    228,318.28x = 26,883,327,039.24
  5. Step 5: Solve for x
    x = 26,883,327,039.24/228,318.28
  6. Step 6: Final answer
    x = 117,744.96

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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.