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Finding the Fourth Proportional to 152.64, 210.57 and 100.16

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Solution

The fourth proportional to 152.64, 210.57 and 100.16 is: 138.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.64 : 210.57 = 100.16 : x
  2. Step 2: Convert to fraction form
    152.64/210.57 = 100.16/x
  3. Step 3: Cross multiply
    152.64x = 210.57 × 100.16
  4. Step 4: Simplify right side
    152.64x = 21,091.22
  5. Step 5: Solve for x
    x = 21,091.22/152.64
  6. Step 6: Final answer
    x = 138.18

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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.