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Finding the Fourth Proportional to 147.00, 202.86 and 81.50

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Solution

The fourth proportional to 147.00, 202.86 and 81.50 is: 112.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.00 : 202.86 = 81.50 : x
  2. Step 2: Convert to fraction form
    147.00/202.86 = 81.50/x
  3. Step 3: Cross multiply
    147.00x = 202.86 × 81.50
  4. Step 4: Simplify right side
    147.00x = 16,533.29
  5. Step 5: Solve for x
    x = 16,533.29/147.00
  6. Step 6: Final answer
    x = 112.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.