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Finding the Fourth Proportional to 152.24, 210.12 and 86.77

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Solution

The fourth proportional to 152.24, 210.12 and 86.77 is: 119.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.24 : 210.12 = 86.77 : x
  2. Step 2: Convert to fraction form
    152.24/210.12 = 86.77/x
  3. Step 3: Cross multiply
    152.24x = 210.12 × 86.77
  4. Step 4: Simplify right side
    152.24x = 18,231.06
  5. Step 5: Solve for x
    x = 18,231.06/152.24
  6. Step 6: Final answer
    x = 119.75

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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.