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Finding the Fourth Proportional to 79,767.78, 109,977.30 and 65,374.62

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Solution

The fourth proportional to 79,767.78, 109,977.30 and 65,374.62 is: 90,133.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,767.78 : 109,977.30 = 65,374.62 : x
  2. Step 2: Convert to fraction form
    79,767.78/109,977.30 = 65,374.62/x
  3. Step 3: Cross multiply
    79,767.78x = 109,977.30 × 65,374.62
  4. Step 4: Simplify right side
    79,767.78x = 7,189,724,196.13
  5. Step 5: Solve for x
    x = 7,189,724,196.13/79,767.78
  6. Step 6: Final answer
    x = 90,133.19

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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.