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Finding the Fourth Proportional to 152.50, 210.55 and 94.31

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Solution

The fourth proportional to 152.50, 210.55 and 94.31 is: 130.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.50 : 210.55 = 94.31 : x
  2. Step 2: Convert to fraction form
    152.50/210.55 = 94.31/x
  3. Step 3: Cross multiply
    152.50x = 210.55 × 94.31
  4. Step 4: Simplify right side
    152.50x = 19,857.03
  5. Step 5: Solve for x
    x = 19,857.03/152.50
  6. Step 6: Final answer
    x = 130.21

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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.