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Finding the Fourth Proportional to 104.60, 156.22 and 87.50

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Solution

The fourth proportional to 104.60, 156.22 and 87.50 is: 130.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.60 : 156.22 = 87.50 : x
  2. Step 2: Convert to fraction form
    104.60/156.22 = 87.50/x
  3. Step 3: Cross multiply
    104.60x = 156.22 × 87.50
  4. Step 4: Simplify right side
    104.60x = 13,669.30
  5. Step 5: Solve for x
    x = 13,669.30/104.60
  6. Step 6: Final answer
    x = 130.68

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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.