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Finding the Fourth Proportional to 86,392, 119,272.80 and 56,635.84

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Solution

The fourth proportional to 86,392, 119,272.80 and 56,635.84 is: 78,191.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,392 : 119,272.80 = 56,635.84 : x
  2. Step 2: Convert to fraction form
    86,392/119,272.80 = 56,635.84/x
  3. Step 3: Cross multiply
    86,392x = 119,272.80 × 56,635.84
  4. Step 4: Simplify right side
    86,392x = 6,755,115,217.15
  5. Step 5: Solve for x
    x = 6,755,115,217.15/86,392
  6. Step 6: Final answer
    x = 78,191.44

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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.