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Finding the Fourth Proportional to 79,651.59, 109,918.35 and 43,840.85

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Solution

The fourth proportional to 79,651.59, 109,918.35 and 43,840.85 is: 60,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,651.59 : 109,918.35 = 43,840.85 : x
  2. Step 2: Convert to fraction form
    79,651.59/109,918.35 = 43,840.85/x
  3. Step 3: Cross multiply
    79,651.59x = 109,918.35 × 43,840.85
  4. Step 4: Simplify right side
    79,651.59x = 4,818,913,345.01
  5. Step 5: Solve for x
    x = 4,818,913,345.01/79,651.59
  6. Step 6: Final answer
    x = 60,499.90

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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.