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Finding the Fourth Proportional to 74,754.99, 103,161.13 and 40,763.40

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Solution

The fourth proportional to 74,754.99, 103,161.13 and 40,763.40 is: 56,253.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,754.99 : 103,161.13 = 40,763.40 : x
  2. Step 2: Convert to fraction form
    74,754.99/103,161.13 = 40,763.40/x
  3. Step 3: Cross multiply
    74,754.99x = 103,161.13 × 40,763.40
  4. Step 4: Simplify right side
    74,754.99x = 4,205,197,917.88
  5. Step 5: Solve for x
    x = 4,205,197,917.88/74,754.99
  6. Step 6: Final answer
    x = 56,253.07

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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.