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Finding the Fourth Proportional to 121.60, 181.63 and 104.53

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Solution

The fourth proportional to 121.60, 181.63 and 104.53 is: 156.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.60 : 181.63 = 104.53 : x
  2. Step 2: Convert to fraction form
    121.60/181.63 = 104.53/x
  3. Step 3: Cross multiply
    121.60x = 181.63 × 104.53
  4. Step 4: Simplify right side
    121.60x = 18,985.26
  5. Step 5: Solve for x
    x = 18,985.26/121.60
  6. Step 6: Final answer
    x = 156.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.