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Finding the Fourth Proportional to 104.69, 156.84 and 64.02

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Solution

The fourth proportional to 104.69, 156.84 and 64.02 is: 95.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.69 : 156.84 = 64.02 : x
  2. Step 2: Convert to fraction form
    104.69/156.84 = 64.02/x
  3. Step 3: Cross multiply
    104.69x = 156.84 × 64.02
  4. Step 4: Simplify right side
    104.69x = 10,041.24
  5. Step 5: Solve for x
    x = 10,041.24/104.69
  6. Step 6: Final answer
    x = 95.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.