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Finding the Fourth Proportional to 62.34, 93.48 and 42.90

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Solution

The fourth proportional to 62.34, 93.48 and 42.90 is: 64.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.34 : 93.48 = 42.90 : x
  2. Step 2: Convert to fraction form
    62.34/93.48 = 42.90/x
  3. Step 3: Cross multiply
    62.34x = 93.48 × 42.90
  4. Step 4: Simplify right side
    62.34x = 4,010.02
  5. Step 5: Solve for x
    x = 4,010.02/62.34
  6. Step 6: Final answer
    x = 64.32

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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.