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Finding the Fourth Proportional to 89.70, 124.10 and 73.29

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Solution

The fourth proportional to 89.70, 124.10 and 73.29 is: 101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.70 : 124.10 = 73.29 : x
  2. Step 2: Convert to fraction form
    89.70/124.10 = 73.29/x
  3. Step 3: Cross multiply
    89.70x = 124.10 × 73.29
  4. Step 4: Simplify right side
    89.70x = 9,095.29
  5. Step 5: Solve for x
    x = 9,095.29/89.70
  6. Step 6: Final answer
    x = 101.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.