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Finding the Fourth Proportional to 189,172.87, 261,012.14 and 124,634.95

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Solution

The fourth proportional to 189,172.87, 261,012.14 and 124,634.95 is: 171,965.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,172.87 : 261,012.14 = 124,634.95 : x
  2. Step 2: Convert to fraction form
    189,172.87/261,012.14 = 124,634.95/x
  3. Step 3: Cross multiply
    189,172.87x = 261,012.14 × 124,634.95
  4. Step 4: Simplify right side
    189,172.87x = 32,531,235,018.29
  5. Step 5: Solve for x
    x = 32,531,235,018.29/189,172.87
  6. Step 6: Final answer
    x = 171,965.65

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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.