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Finding the Fourth Proportional to 228,378.80, 342,108.92 and 128,389.16

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Solution

The fourth proportional to 228,378.80, 342,108.92 and 128,389.16 is: 192,325.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,378.80 : 342,108.92 = 128,389.16 : x
  2. Step 2: Convert to fraction form
    228,378.80/342,108.92 = 128,389.16/x
  3. Step 3: Cross multiply
    228,378.80x = 342,108.92 × 128,389.16
  4. Step 4: Simplify right side
    228,378.80x = 43,923,076,867.31
  5. Step 5: Solve for x
    x = 43,923,076,867.31/228,378.80
  6. Step 6: Final answer
    x = 192,325.54

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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.