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Finding the Fourth Proportional to 207.10, 285.72 and 124.19

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Solution

The fourth proportional to 207.10, 285.72 and 124.19 is: 171.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.10 : 285.72 = 124.19 : x
  2. Step 2: Convert to fraction form
    207.10/285.72 = 124.19/x
  3. Step 3: Cross multiply
    207.10x = 285.72 × 124.19
  4. Step 4: Simplify right side
    207.10x = 35,483.57
  5. Step 5: Solve for x
    x = 35,483.57/207.10
  6. Step 6: Final answer
    x = 171.34

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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.