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Finding the Fourth Proportional to 152.76, 228.88 and 71.52

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Solution

The fourth proportional to 152.76, 228.88 and 71.52 is: 107.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.76 : 228.88 = 71.52 : x
  2. Step 2: Convert to fraction form
    152.76/228.88 = 71.52/x
  3. Step 3: Cross multiply
    152.76x = 228.88 × 71.52
  4. Step 4: Simplify right side
    152.76x = 16,369.50
  5. Step 5: Solve for x
    x = 16,369.50/152.76
  6. Step 6: Final answer
    x = 107.16

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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.