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Finding the Fourth Proportional to 104.84, 156.60 and 88.64

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Solution

The fourth proportional to 104.84, 156.60 and 88.64 is: 132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.84 : 156.60 = 88.64 : x
  2. Step 2: Convert to fraction form
    104.84/156.60 = 88.64/x
  3. Step 3: Cross multiply
    104.84x = 156.60 × 88.64
  4. Step 4: Simplify right side
    104.84x = 13,881.02
  5. Step 5: Solve for x
    x = 13,881.02/104.84
  6. Step 6: Final answer
    x = 132.40

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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.