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Finding the Fourth Proportional to 60,939.40, 91,409.10 and 54,329.80

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Solution

The fourth proportional to 60,939.40, 91,409.10 and 54,329.80 is: 81,494.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,939.40 : 91,409.10 = 54,329.80 : x
  2. Step 2: Convert to fraction form
    60,939.40/91,409.10 = 54,329.80/x
  3. Step 3: Cross multiply
    60,939.40x = 91,409.10 × 54,329.80
  4. Step 4: Simplify right side
    60,939.40x = 4,966,238,121.18
  5. Step 5: Solve for x
    x = 4,966,238,121.18/60,939.40
  6. Step 6: Final answer
    x = 81,494.70

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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.