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Finding the Fourth Proportional to 78,984.92, 109,002.12 and 43,177.36

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Solution

The fourth proportional to 78,984.92, 109,002.12 and 43,177.36 is: 59,586.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,984.92 : 109,002.12 = 43,177.36 : x
  2. Step 2: Convert to fraction form
    78,984.92/109,002.12 = 43,177.36/x
  3. Step 3: Cross multiply
    78,984.92x = 109,002.12 × 43,177.36
  4. Step 4: Simplify right side
    78,984.92x = 4,706,423,776.00
  5. Step 5: Solve for x
    x = 4,706,423,776.00/78,984.92
  6. Step 6: Final answer
    x = 59,586.36

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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.