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Finding the Fourth Proportional to 156.12, 234 and 64.77

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Solution

The fourth proportional to 156.12, 234 and 64.77 is: 97.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.12 : 234 = 64.77 : x
  2. Step 2: Convert to fraction form
    156.12/234 = 64.77/x
  3. Step 3: Cross multiply
    156.12x = 234 × 64.77
  4. Step 4: Simplify right side
    156.12x = 15,156.18
  5. Step 5: Solve for x
    x = 15,156.18/156.12
  6. Step 6: Final answer
    x = 97.08

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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.