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Finding the Fourth Proportional to 78,660.88, 117,992.52 and 28,751.08

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Solution

The fourth proportional to 78,660.88, 117,992.52 and 28,751.08 is: 43,127.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,660.88 : 117,992.52 = 28,751.08 : x
  2. Step 2: Convert to fraction form
    78,660.88/117,992.52 = 28,751.08/x
  3. Step 3: Cross multiply
    78,660.88x = 117,992.52 × 28,751.08
  4. Step 4: Simplify right side
    78,660.88x = 3,392,412,381.92
  5. Step 5: Solve for x
    x = 3,392,412,381.92/78,660.88
  6. Step 6: Final answer
    x = 43,127.06

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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.