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Finding the Fourth Proportional to 152.02, 210.21 and 115.16

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Solution

The fourth proportional to 152.02, 210.21 and 115.16 is: 159.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.02 : 210.21 = 115.16 : x
  2. Step 2: Convert to fraction form
    152.02/210.21 = 115.16/x
  3. Step 3: Cross multiply
    152.02x = 210.21 × 115.16
  4. Step 4: Simplify right side
    152.02x = 24,207.78
  5. Step 5: Solve for x
    x = 24,207.78/152.02
  6. Step 6: Final answer
    x = 159.25

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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.