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Finding the Fourth Proportional to 60.15, 90.18 and 29.70

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Solution

The fourth proportional to 60.15, 90.18 and 29.70 is: 44.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.15 : 90.18 = 29.70 : x
  2. Step 2: Convert to fraction form
    60.15/90.18 = 29.70/x
  3. Step 3: Cross multiply
    60.15x = 90.18 × 29.70
  4. Step 4: Simplify right side
    60.15x = 2,678.35
  5. Step 5: Solve for x
    x = 2,678.35/60.15
  6. Step 6: Final answer
    x = 44.53

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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.