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Finding the Fourth Proportional to 79,487.55, 109,694.85 and 43,678.47

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Solution

The fourth proportional to 79,487.55, 109,694.85 and 43,678.47 is: 60,277.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,487.55 : 109,694.85 = 43,678.47 : x
  2. Step 2: Convert to fraction form
    79,487.55/109,694.85 = 43,678.47/x
  3. Step 3: Cross multiply
    79,487.55x = 109,694.85 × 43,678.47
  4. Step 4: Simplify right side
    79,487.55x = 4,791,303,214.88
  5. Step 5: Solve for x
    x = 4,791,303,214.88/79,487.55
  6. Step 6: Final answer
    x = 60,277.40

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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.