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Finding the Fourth Proportional to 152.89, 210.80 and 106.30

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Solution

The fourth proportional to 152.89, 210.80 and 106.30 is: 146.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.89 : 210.80 = 106.30 : x
  2. Step 2: Convert to fraction form
    152.89/210.80 = 106.30/x
  3. Step 3: Cross multiply
    152.89x = 210.80 × 106.30
  4. Step 4: Simplify right side
    152.89x = 22,406.45
  5. Step 5: Solve for x
    x = 22,406.45/152.89
  6. Step 6: Final answer
    x = 146.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.