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Finding the Fourth Proportional to 152.06, 228.09 and 66.50

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Solution

The fourth proportional to 152.06, 228.09 and 66.50 is: 99.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.06 : 228.09 = 66.50 : x
  2. Step 2: Convert to fraction form
    152.06/228.09 = 66.50/x
  3. Step 3: Cross multiply
    152.06x = 228.09 × 66.50
  4. Step 4: Simplify right side
    152.06x = 15,167.99
  5. Step 5: Solve for x
    x = 15,167.99/152.06
  6. Step 6: Final answer
    x = 99.75

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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.