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Finding the Fourth Proportional to 79,063, 109,132.86 and 56,771.80

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Solution

The fourth proportional to 79,063, 109,132.86 and 56,771.80 is: 78,363.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,063 : 109,132.86 = 56,771.80 : x
  2. Step 2: Convert to fraction form
    79,063/109,132.86 = 56,771.80/x
  3. Step 3: Cross multiply
    79,063x = 109,132.86 × 56,771.80
  4. Step 4: Simplify right side
    79,063x = 6,195,668,901.35
  5. Step 5: Solve for x
    x = 6,195,668,901.35/79,063
  6. Step 6: Final answer
    x = 78,363.70

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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.