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Finding the Fourth Proportional to 60.21, 90.45 and 42.32

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Solution

The fourth proportional to 60.21, 90.45 and 42.32 is: 63.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.21 : 90.45 = 42.32 : x
  2. Step 2: Convert to fraction form
    60.21/90.45 = 42.32/x
  3. Step 3: Cross multiply
    60.21x = 90.45 × 42.32
  4. Step 4: Simplify right side
    60.21x = 3,828.07
  5. Step 5: Solve for x
    x = 3,828.07/60.21
  6. Step 6: Final answer
    x = 63.58

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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.