Home / 102,809.08-141,956.94-78,897.88

Finding the Fourth Proportional to 102,809.08, 141,956.94 and 78,897.88

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Solution

The fourth proportional to 102,809.08, 141,956.94 and 78,897.88 is: 108,940.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,809.08 : 141,956.94 = 78,897.88 : x
  2. Step 2: Convert to fraction form
    102,809.08/141,956.94 = 78,897.88/x
  3. Step 3: Cross multiply
    102,809.08x = 141,956.94 × 78,897.88
  4. Step 4: Simplify right side
    102,809.08x = 11,200,101,617.29
  5. Step 5: Solve for x
    x = 11,200,101,617.29/102,809.08
  6. Step 6: Final answer
    x = 108,940.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.