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Finding the Fourth Proportional to 74,689.70, 112,067.50 and 39,620.76

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Solution

The fourth proportional to 74,689.70, 112,067.50 and 39,620.76 is: 59,448.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.70 : 112,067.50 = 39,620.76 : x
  2. Step 2: Convert to fraction form
    74,689.70/112,067.50 = 39,620.76/x
  3. Step 3: Cross multiply
    74,689.70x = 112,067.50 × 39,620.76
  4. Step 4: Simplify right side
    74,689.70x = 4,440,199,521.30
  5. Step 5: Solve for x
    x = 4,440,199,521.30/74,689.70
  6. Step 6: Final answer
    x = 59,448.62

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1.5x scale

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.