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Finding the Fourth Proportional to 156.77, 235.18 and 54.03

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Solution

The fourth proportional to 156.77, 235.18 and 54.03 is: 81.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.77 : 235.18 = 54.03 : x
  2. Step 2: Convert to fraction form
    156.77/235.18 = 54.03/x
  3. Step 3: Cross multiply
    156.77x = 235.18 × 54.03
  4. Step 4: Simplify right side
    156.77x = 12,705.60
  5. Step 5: Solve for x
    x = 12,705.60/156.77
  6. Step 6: Final answer
    x = 81.05

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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.