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Finding the Fourth Proportional to 55.90, 83.90 and 35.63

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Solution

The fourth proportional to 55.90, 83.90 and 35.63 is: 53.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.90 : 83.90 = 35.63 : x
  2. Step 2: Convert to fraction form
    55.90/83.90 = 35.63/x
  3. Step 3: Cross multiply
    55.90x = 83.90 × 35.63
  4. Step 4: Simplify right side
    55.90x = 2,989.34
  5. Step 5: Solve for x
    x = 2,989.34/55.90
  6. Step 6: Final answer
    x = 53.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.