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Finding the Fourth Proportional to 156.56, 234.88 and 60.40

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Solution

The fourth proportional to 156.56, 234.88 and 60.40 is: 90.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.56 : 234.88 = 60.40 : x
  2. Step 2: Convert to fraction form
    156.56/234.88 = 60.40/x
  3. Step 3: Cross multiply
    156.56x = 234.88 × 60.40
  4. Step 4: Simplify right side
    156.56x = 14,186.75
  5. Step 5: Solve for x
    x = 14,186.75/156.56
  6. Step 6: Final answer
    x = 90.62

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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.