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Finding the Fourth Proportional to 74,689.25, 103,069.85 and 40,697.96

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Solution

The fourth proportional to 74,689.25, 103,069.85 and 40,697.96 is: 56,162.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.25 : 103,069.85 = 40,697.96 : x
  2. Step 2: Convert to fraction form
    74,689.25/103,069.85 = 40,697.96/x
  3. Step 3: Cross multiply
    74,689.25x = 103,069.85 × 40,697.96
  4. Step 4: Simplify right side
    74,689.25x = 4,194,731,913.67
  5. Step 5: Solve for x
    x = 4,194,731,913.67/74,689.25
  6. Step 6: Final answer
    x = 56,162.46

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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.