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Finding the Fourth Proportional to 152.43, 210.30 and 100.00

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Solution

The fourth proportional to 152.43, 210.30 and 100.00 is: 137.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.43 : 210.30 = 100.00 : x
  2. Step 2: Convert to fraction form
    152.43/210.30 = 100.00/x
  3. Step 3: Cross multiply
    152.43x = 210.30 × 100.00
  4. Step 4: Simplify right side
    152.43x = 21,029.89
  5. Step 5: Solve for x
    x = 21,029.89/152.43
  6. Step 6: Final answer
    x = 137.97

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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.