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Finding the Fourth Proportional to 74,821.81, 112,253.81 and 30,480.39

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Solution

The fourth proportional to 74,821.81, 112,253.81 and 30,480.39 is: 45,729.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,821.81 : 112,253.81 = 30,480.39 : x
  2. Step 2: Convert to fraction form
    74,821.81/112,253.81 = 30,480.39/x
  3. Step 3: Cross multiply
    74,821.81x = 112,253.81 × 30,480.39
  4. Step 4: Simplify right side
    74,821.81x = 3,421,539,907.79
  5. Step 5: Solve for x
    x = 3,421,539,907.79/74,821.81
  6. Step 6: Final answer
    x = 45,729.18

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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.