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Finding the Fourth Proportional to 152.95, 211.43 and 118.15

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Solution

The fourth proportional to 152.95, 211.43 and 118.15 is: 163.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.95 : 211.43 = 118.15 : x
  2. Step 2: Convert to fraction form
    152.95/211.43 = 118.15/x
  3. Step 3: Cross multiply
    152.95x = 211.43 × 118.15
  4. Step 4: Simplify right side
    152.95x = 24,980.45
  5. Step 5: Solve for x
    x = 24,980.45/152.95
  6. Step 6: Final answer
    x = 163.32

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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.