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Finding the Fourth Proportional to 74,694.72, 112,039.83 and 30,320.40

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Solution

The fourth proportional to 74,694.72, 112,039.83 and 30,320.40 is: 45,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,694.72 : 112,039.83 = 30,320.40 : x
  2. Step 2: Convert to fraction form
    74,694.72/112,039.83 = 30,320.40/x
  3. Step 3: Cross multiply
    74,694.72x = 112,039.83 × 30,320.40
  4. Step 4: Simplify right side
    74,694.72x = 3,397,092,461.53
  5. Step 5: Solve for x
    x = 3,397,092,461.53/74,694.72
  6. Step 6: Final answer
    x = 45,479.69

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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.