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Finding the Fourth Proportional to 78,519.73, 117,717.63 and 39,055.32

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Solution

The fourth proportional to 78,519.73, 117,717.63 and 39,055.32 is: 58,552.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519.73 : 117,717.63 = 39,055.32 : x
  2. Step 2: Convert to fraction form
    78,519.73/117,717.63 = 39,055.32/x
  3. Step 3: Cross multiply
    78,519.73x = 117,717.63 × 39,055.32
  4. Step 4: Simplify right side
    78,519.73x = 4,597,499,709.29
  5. Step 5: Solve for x
    x = 4,597,499,709.29/78,519.73
  6. Step 6: Final answer
    x = 58,552.16

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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.