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Finding the Fourth Proportional to 74,981.66, 112,429.94 and 30,556.40

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Solution

The fourth proportional to 74,981.66, 112,429.94 and 30,556.40 is: 45,817.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,981.66 : 112,429.94 = 30,556.40 : x
  2. Step 2: Convert to fraction form
    74,981.66/112,429.94 = 30,556.40/x
  3. Step 3: Cross multiply
    74,981.66x = 112,429.94 × 30,556.40
  4. Step 4: Simplify right side
    74,981.66x = 3,435,454,218.62
  5. Step 5: Solve for x
    x = 3,435,454,218.62/74,981.66
  6. Step 6: Final answer
    x = 45,817.26

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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.