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Finding the Fourth Proportional to 60,362.82, 90,545.34 and 20,921.22

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Solution

The fourth proportional to 60,362.82, 90,545.34 and 20,921.22 is: 31,382.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,362.82 : 90,545.34 = 20,921.22 : x
  2. Step 2: Convert to fraction form
    60,362.82/90,545.34 = 20,921.22/x
  3. Step 3: Cross multiply
    60,362.82x = 90,545.34 × 20,921.22
  4. Step 4: Simplify right side
    60,362.82x = 1,894,318,978.11
  5. Step 5: Solve for x
    x = 1,894,318,978.11/60,362.82
  6. Step 6: Final answer
    x = 31,382.21

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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.