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Finding the Fourth Proportional to 152.83, 210.82 and 90.63

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Solution

The fourth proportional to 152.83, 210.82 and 90.63 is: 125.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.83 : 210.82 = 90.63 : x
  2. Step 2: Convert to fraction form
    152.83/210.82 = 90.63/x
  3. Step 3: Cross multiply
    152.83x = 210.82 × 90.63
  4. Step 4: Simplify right side
    152.83x = 19,105.11
  5. Step 5: Solve for x
    x = 19,105.11/152.83
  6. Step 6: Final answer
    x = 125.01

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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.