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Finding the Fourth Proportional to 74,982.88, 103,472.80 and 40,993.12

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Solution

The fourth proportional to 74,982.88, 103,472.80 and 40,993.12 is: 56,568.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,982.88 : 103,472.80 = 40,993.12 : x
  2. Step 2: Convert to fraction form
    74,982.88/103,472.80 = 40,993.12/x
  3. Step 3: Cross multiply
    74,982.88x = 103,472.80 × 40,993.12
  4. Step 4: Simplify right side
    74,982.88x = 4,241,672,907.14
  5. Step 5: Solve for x
    x = 4,241,672,907.14/74,982.88
  6. Step 6: Final answer
    x = 56,568.55

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1.5x scale

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.