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Finding the Fourth Proportional to 69,139.81, 103,711.76 and 27,018.19

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Solution

The fourth proportional to 69,139.81, 103,711.76 and 27,018.19 is: 40,528.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,139.81 : 103,711.76 = 27,018.19 : x
  2. Step 2: Convert to fraction form
    69,139.81/103,711.76 = 27,018.19/x
  3. Step 3: Cross multiply
    69,139.81x = 103,711.76 × 27,018.19
  4. Step 4: Simplify right side
    69,139.81x = 2,802,104,036.91
  5. Step 5: Solve for x
    x = 2,802,104,036.91/69,139.81
  6. Step 6: Final answer
    x = 40,528.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.