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Finding the Fourth Proportional to 78,379.32, 117,574.62 and 38,896.68

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Solution

The fourth proportional to 78,379.32, 117,574.62 and 38,896.68 is: 58,347.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,379.32 : 117,574.62 = 38,896.68 : x
  2. Step 2: Convert to fraction form
    78,379.32/117,574.62 = 38,896.68/x
  3. Step 3: Cross multiply
    78,379.32x = 117,574.62 × 38,896.68
  4. Step 4: Simplify right side
    78,379.32x = 4,573,262,370.26
  5. Step 5: Solve for x
    x = 4,573,262,370.26/78,379.32
  6. Step 6: Final answer
    x = 58,347.82

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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.