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Finding the Fourth Proportional to 228,265.90, 342,118.42 and 128,215.78

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Solution

The fourth proportional to 228,265.90, 342,118.42 and 128,215.78 is: 192,166.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,265.90 : 342,118.42 = 128,215.78 : x
  2. Step 2: Convert to fraction form
    228,265.90/342,118.42 = 128,215.78/x
  3. Step 3: Cross multiply
    228,265.90x = 342,118.42 × 128,215.78
  4. Step 4: Simplify right side
    228,265.90x = 43,864,980,072.67
  5. Step 5: Solve for x
    x = 43,864,980,072.67/228,265.90
  6. Step 6: Final answer
    x = 192,166.15

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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.