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Finding the Fourth Proportional to 74,882.94, 103,338.63 and 40,891.49

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Solution

The fourth proportional to 74,882.94, 103,338.63 and 40,891.49 is: 56,430.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,882.94 : 103,338.63 = 40,891.49 : x
  2. Step 2: Convert to fraction form
    74,882.94/103,338.63 = 40,891.49/x
  3. Step 3: Cross multiply
    74,882.94x = 103,338.63 × 40,891.49
  4. Step 4: Simplify right side
    74,882.94x = 4,225,670,555.26
  5. Step 5: Solve for x
    x = 4,225,670,555.26/74,882.94
  6. Step 6: Final answer
    x = 56,430.35

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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.