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Finding the Fourth Proportional to 60,491.80, 90,737.70 and 21,052.90

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Solution

The fourth proportional to 60,491.80, 90,737.70 and 21,052.90 is: 31,579.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,491.80 : 90,737.70 = 21,052.90 : x
  2. Step 2: Convert to fraction form
    60,491.80/90,737.70 = 21,052.90/x
  3. Step 3: Cross multiply
    60,491.80x = 90,737.70 × 21,052.90
  4. Step 4: Simplify right side
    60,491.80x = 1,910,291,724.33
  5. Step 5: Solve for x
    x = 1,910,291,724.33/60,491.80
  6. Step 6: Final answer
    x = 31,579.35

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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.