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Finding the Fourth Proportional to 90.04, 124.26 and 53.20

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Solution

The fourth proportional to 90.04, 124.26 and 53.20 is: 73.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.04 : 124.26 = 53.20 : x
  2. Step 2: Convert to fraction form
    90.04/124.26 = 53.20/x
  3. Step 3: Cross multiply
    90.04x = 124.26 × 53.20
  4. Step 4: Simplify right side
    90.04x = 6,611.09
  5. Step 5: Solve for x
    x = 6,611.09/90.04
  6. Step 6: Final answer
    x = 73.42

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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.