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Finding the Fourth Proportional to 69,075.87, 103,610.71 and 21,689.83

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Solution

The fourth proportional to 69,075.87, 103,610.71 and 21,689.83 is: 32,533.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,075.87 : 103,610.71 = 21,689.83 : x
  2. Step 2: Convert to fraction form
    69,075.87/103,610.71 = 21,689.83/x
  3. Step 3: Cross multiply
    69,075.87x = 103,610.71 × 21,689.83
  4. Step 4: Simplify right side
    69,075.87x = 2,247,298,686.08
  5. Step 5: Solve for x
    x = 2,247,298,686.08/69,075.87
  6. Step 6: Final answer
    x = 32,533.77

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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.