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Finding the Fourth Proportional to 189,187.65, 261,068.54 and 108,609.93

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Solution

The fourth proportional to 189,187.65, 261,068.54 and 108,609.93 is: 149,875.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,187.65 : 261,068.54 = 108,609.93 : x
  2. Step 2: Convert to fraction form
    189,187.65/261,068.54 = 108,609.93/x
  3. Step 3: Cross multiply
    189,187.65x = 261,068.54 × 108,609.93
  4. Step 4: Simplify right side
    189,187.65x = 28,354,635,311.55
  5. Step 5: Solve for x
    x = 28,354,635,311.55/189,187.65
  6. Step 6: Final answer
    x = 149,875.72

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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.