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Finding the Fourth Proportional to 212.10, 292.62 and 124.71

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Solution

The fourth proportional to 212.10, 292.62 and 124.71 is: 172.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.10 : 292.62 = 124.71 : x
  2. Step 2: Convert to fraction form
    212.10/292.62 = 124.71/x
  3. Step 3: Cross multiply
    212.10x = 292.62 × 124.71
  4. Step 4: Simplify right side
    212.10x = 36,492.64
  5. Step 5: Solve for x
    x = 36,492.64/212.10
  6. Step 6: Final answer
    x = 172.05

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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.