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Finding the Fourth Proportional to 156.09, 235.38 and 147.60

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Solution

The fourth proportional to 156.09, 235.38 and 147.60 is: 222.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.09 : 235.38 = 147.60 : x
  2. Step 2: Convert to fraction form
    156.09/235.38 = 147.60/x
  3. Step 3: Cross multiply
    156.09x = 235.38 × 147.60
  4. Step 4: Simplify right side
    156.09x = 34,742.09
  5. Step 5: Solve for x
    x = 34,742.09/156.09
  6. Step 6: Final answer
    x = 222.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.