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Finding the Fourth Proportional to 158,256, 218,393.28 and 87,600

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Solution

The fourth proportional to 158,256, 218,393.28 and 87,600 is: 120,888

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,256 : 218,393.28 = 87,600 : x
  2. Step 2: Convert to fraction form
    158,256/218,393.28 = 87,600/x
  3. Step 3: Cross multiply
    158,256x = 218,393.28 × 87,600
  4. Step 4: Simplify right side
    158,256x = 19,131,251,328
  5. Step 5: Solve for x
    x = 19,131,251,328/158,256
  6. Step 6: Final answer
    x = 120,888

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.