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Finding the Fourth Proportional to 74,689.80, 103,074.53 and 40,701.08

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Solution

The fourth proportional to 74,689.80, 103,074.53 and 40,701.08 is: 56,168.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.80 : 103,074.53 = 40,701.08 : x
  2. Step 2: Convert to fraction form
    74,689.80/103,074.53 = 40,701.08/x
  3. Step 3: Cross multiply
    74,689.80x = 103,074.53 × 40,701.08
  4. Step 4: Simplify right side
    74,689.80x = 4,195,244,745.67
  5. Step 5: Solve for x
    x = 4,195,244,745.67/74,689.80
  6. Step 6: Final answer
    x = 56,168.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.