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Finding the Fourth Proportional to 72.58, 99.99 and 60.28

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Solution

The fourth proportional to 72.58, 99.99 and 60.28 is: 83.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.58 : 99.99 = 60.28 : x
  2. Step 2: Convert to fraction form
    72.58/99.99 = 60.28/x
  3. Step 3: Cross multiply
    72.58x = 99.99 × 60.28
  4. Step 4: Simplify right side
    72.58x = 6,027.40
  5. Step 5: Solve for x
    x = 6,027.40/72.58
  6. Step 6: Final answer
    x = 83.04

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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.