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Finding the Fourth Proportional to 152.53, 228.75 and 71.29

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Solution

The fourth proportional to 152.53, 228.75 and 71.29 is: 106.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.53 : 228.75 = 71.29 : x
  2. Step 2: Convert to fraction form
    152.53/228.75 = 71.29/x
  3. Step 3: Cross multiply
    152.53x = 228.75 × 71.29
  4. Step 4: Simplify right side
    152.53x = 16,307.59
  5. Step 5: Solve for x
    x = 16,307.59/152.53
  6. Step 6: Final answer
    x = 106.91

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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.