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Finding the Fourth Proportional to 152.10, 228 and 70.90

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Solution

The fourth proportional to 152.10, 228 and 70.90 is: 106.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.10 : 228 = 70.90 : x
  2. Step 2: Convert to fraction form
    152.10/228 = 70.90/x
  3. Step 3: Cross multiply
    152.10x = 228 × 70.90
  4. Step 4: Simplify right side
    152.10x = 16,165.20
  5. Step 5: Solve for x
    x = 16,165.20/152.10
  6. Step 6: Final answer
    x = 106.28

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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.