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Finding the Fourth Proportional to 92,751.21, 139,012.80 and 42,761.92

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Solution

The fourth proportional to 92,751.21, 139,012.80 and 42,761.92 is: 64,090.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,751.21 : 139,012.80 = 42,761.92 : x
  2. Step 2: Convert to fraction form
    92,751.21/139,012.80 = 42,761.92/x
  3. Step 3: Cross multiply
    92,751.21x = 139,012.80 × 42,761.92
  4. Step 4: Simplify right side
    92,751.21x = 5,944,454,232.58
  5. Step 5: Solve for x
    x = 5,944,454,232.58/92,751.21
  6. Step 6: Final answer
    x = 64,090.31

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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.