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Finding the Fourth Proportional to 79,516.50, 109,733.49 and 43,218.28

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Solution

The fourth proportional to 79,516.50, 109,733.49 and 43,218.28 is: 59,641.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,516.50 : 109,733.49 = 43,218.28 : x
  2. Step 2: Convert to fraction form
    79,516.50/109,733.49 = 43,218.28/x
  3. Step 3: Cross multiply
    79,516.50x = 109,733.49 × 43,218.28
  4. Step 4: Simplify right side
    79,516.50x = 4,742,492,961.92
  5. Step 5: Solve for x
    x = 4,742,492,961.92/79,516.50
  6. Step 6: Final answer
    x = 59,641.62

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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.