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Finding the Fourth Proportional to 74,764.76, 112,147.14 and 28,011.56

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Solution

The fourth proportional to 74,764.76, 112,147.14 and 28,011.56 is: 42,017.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,764.76 : 112,147.14 = 28,011.56 : x
  2. Step 2: Convert to fraction form
    74,764.76/112,147.14 = 28,011.56/x
  3. Step 3: Cross multiply
    74,764.76x = 112,147.14 × 28,011.56
  4. Step 4: Simplify right side
    74,764.76x = 3,141,416,340.94
  5. Step 5: Solve for x
    x = 3,141,416,340.94/74,764.76
  6. Step 6: Final answer
    x = 42,017.34

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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.