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Finding the Fourth Proportional to 78,479.92, 117,653.52 and 34,073.08

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Solution

The fourth proportional to 78,479.92, 117,653.52 and 34,073.08 is: 51,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,479.92 : 117,653.52 = 34,073.08 : x
  2. Step 2: Convert to fraction form
    78,479.92/117,653.52 = 34,073.08/x
  3. Step 3: Cross multiply
    78,479.92x = 117,653.52 × 34,073.08
  4. Step 4: Simplify right side
    78,479.92x = 4,008,817,799.24
  5. Step 5: Solve for x
    x = 4,008,817,799.24/78,479.92
  6. Step 6: Final answer
    x = 51,080.81

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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.