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Finding the Fourth Proportional to 228,376.80, 342,105.93 and 128,387.16

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Solution

The fourth proportional to 228,376.80, 342,105.93 and 128,387.16 is: 192,322.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,376.80 : 342,105.93 = 128,387.16 : x
  2. Step 2: Convert to fraction form
    228,376.80/342,105.93 = 128,387.16/x
  3. Step 3: Cross multiply
    228,376.80x = 342,105.93 × 128,387.16
  4. Step 4: Simplify right side
    228,376.80x = 43,922,008,771.86
  5. Step 5: Solve for x
    x = 43,922,008,771.86/228,376.80
  6. Step 6: Final answer
    x = 192,322.55

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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.