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Finding the Fourth Proportional to 189,146.59, 283,787.66 and 81,030.61

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Solution

The fourth proportional to 189,146.59, 283,787.66 and 81,030.61 is: 121,574.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,146.59 : 283,787.66 = 81,030.61 : x
  2. Step 2: Convert to fraction form
    189,146.59/283,787.66 = 81,030.61/x
  3. Step 3: Cross multiply
    189,146.59x = 283,787.66 × 81,030.61
  4. Step 4: Simplify right side
    189,146.59x = 22,995,487,200.27
  5. Step 5: Solve for x
    x = 22,995,487,200.27/189,146.59
  6. Step 6: Final answer
    x = 121,574.95

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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.