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Finding the Fourth Proportional to 69,048.71, 103,561.53 and 19,133.87

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Solution

The fourth proportional to 69,048.71, 103,561.53 and 19,133.87 is: 28,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,048.71 : 103,561.53 = 19,133.87 : x
  2. Step 2: Convert to fraction form
    69,048.71/103,561.53 = 19,133.87/x
  3. Step 3: Cross multiply
    69,048.71x = 103,561.53 × 19,133.87
  4. Step 4: Simplify right side
    69,048.71x = 1,981,532,334.21
  5. Step 5: Solve for x
    x = 1,981,532,334.21/69,048.71
  6. Step 6: Final answer
    x = 28,697.60

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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.