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Finding the Fourth Proportional to 102.02, 152.90 and 56.36

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Solution

The fourth proportional to 102.02, 152.90 and 56.36 is: 84.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.02 : 152.90 = 56.36 : x
  2. Step 2: Convert to fraction form
    102.02/152.90 = 56.36/x
  3. Step 3: Cross multiply
    102.02x = 152.90 × 56.36
  4. Step 4: Simplify right side
    102.02x = 8,617.44
  5. Step 5: Solve for x
    x = 8,617.44/102.02
  6. Step 6: Final answer
    x = 84.47

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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.