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Finding the Fourth Proportional to 156.15, 233.85 and 87.48

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Solution

The fourth proportional to 156.15, 233.85 and 87.48 is: 131.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.15 : 233.85 = 87.48 : x
  2. Step 2: Convert to fraction form
    156.15/233.85 = 87.48/x
  3. Step 3: Cross multiply
    156.15x = 233.85 × 87.48
  4. Step 4: Simplify right side
    156.15x = 20,457.20
  5. Step 5: Solve for x
    x = 20,457.20/156.15
  6. Step 6: Final answer
    x = 131.01

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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.