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Finding the Fourth Proportional to 48.16, 72.08 and 40.50

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Solution

The fourth proportional to 48.16, 72.08 and 40.50 is: 60.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.16 : 72.08 = 40.50 : x
  2. Step 2: Convert to fraction form
    48.16/72.08 = 40.50/x
  3. Step 3: Cross multiply
    48.16x = 72.08 × 40.50
  4. Step 4: Simplify right side
    48.16x = 2,919.24
  5. Step 5: Solve for x
    x = 2,919.24/48.16
  6. Step 6: Final answer
    x = 60.62

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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.