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Finding the Fourth Proportional to 228,218.40, 342,385.92 and 87,939.36

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Solution

The fourth proportional to 228,218.40, 342,385.92 and 87,939.36 is: 131,931.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,218.40 : 342,385.92 = 87,939.36 : x
  2. Step 2: Convert to fraction form
    228,218.40/342,385.92 = 87,939.36/x
  3. Step 3: Cross multiply
    228,218.40x = 342,385.92 × 87,939.36
  4. Step 4: Simplify right side
    228,218.40x = 30,109,198,677.81
  5. Step 5: Solve for x
    x = 30,109,198,677.81/228,218.40
  6. Step 6: Final answer
    x = 131,931.51

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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.