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Finding the Fourth Proportional to 74,963.80, 112,427.70 and 43,305.40

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Solution

The fourth proportional to 74,963.80, 112,427.70 and 43,305.40 is: 64,947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,963.80 : 112,427.70 = 43,305.40 : x
  2. Step 2: Convert to fraction form
    74,963.80/112,427.70 = 43,305.40/x
  3. Step 3: Cross multiply
    74,963.80x = 112,427.70 × 43,305.40
  4. Step 4: Simplify right side
    74,963.80x = 4,868,726,519.58
  5. Step 5: Solve for x
    x = 4,868,726,519.58/74,963.80
  6. Step 6: Final answer
    x = 64,947.70

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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.