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Finding the Fourth Proportional to 124.60, 172.08 and 83.34

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Solution

The fourth proportional to 124.60, 172.08 and 83.34 is: 115.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.60 : 172.08 = 83.34 : x
  2. Step 2: Convert to fraction form
    124.60/172.08 = 83.34/x
  3. Step 3: Cross multiply
    124.60x = 172.08 × 83.34
  4. Step 4: Simplify right side
    124.60x = 14,341.15
  5. Step 5: Solve for x
    x = 14,341.15/124.60
  6. Step 6: Final answer
    x = 115.10

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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.