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Finding the Fourth Proportional to 152.61, 210.62 and 90.44

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Solution

The fourth proportional to 152.61, 210.62 and 90.44 is: 124.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.61 : 210.62 = 90.44 : x
  2. Step 2: Convert to fraction form
    152.61/210.62 = 90.44/x
  3. Step 3: Cross multiply
    152.61x = 210.62 × 90.44
  4. Step 4: Simplify right side
    152.61x = 19,046.97
  5. Step 5: Solve for x
    x = 19,046.97/152.61
  6. Step 6: Final answer
    x = 124.81

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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.