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Finding the Fourth Proportional to 189,639.74, 261,680.54 and 104,751.74

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Solution

The fourth proportional to 189,639.74, 261,680.54 and 104,751.74 is: 144,545.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,639.74 : 261,680.54 = 104,751.74 : x
  2. Step 2: Convert to fraction form
    189,639.74/261,680.54 = 104,751.74/x
  3. Step 3: Cross multiply
    189,639.74x = 261,680.54 × 104,751.74
  4. Step 4: Simplify right side
    189,639.74x = 27,411,491,889.14
  5. Step 5: Solve for x
    x = 27,411,491,889.14/189,639.74
  6. Step 6: Final answer
    x = 144,545.08

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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.