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Finding the Fourth Proportional to 74,878.80, 112,221.25 and 30,453.94

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Solution

The fourth proportional to 74,878.80, 112,221.25 and 30,453.94 is: 45,641.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,878.80 : 112,221.25 = 30,453.94 : x
  2. Step 2: Convert to fraction form
    74,878.80/112,221.25 = 30,453.94/x
  3. Step 3: Cross multiply
    74,878.80x = 112,221.25 × 30,453.94
  4. Step 4: Simplify right side
    74,878.80x = 3,417,579,278.37
  5. Step 5: Solve for x
    x = 3,417,579,278.37/74,878.80
  6. Step 6: Final answer
    x = 45,641.48

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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.