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Finding the Fourth Proportional to 119,838.69, 165,374.60 and 66,123.68

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Solution

The fourth proportional to 119,838.69, 165,374.60 and 66,123.68 is: 91,249.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,838.69 : 165,374.60 = 66,123.68 : x
  2. Step 2: Convert to fraction form
    119,838.69/165,374.60 = 66,123.68/x
  3. Step 3: Cross multiply
    119,838.69x = 165,374.60 × 66,123.68
  4. Step 4: Simplify right side
    119,838.69x = 10,935,175,973.04
  5. Step 5: Solve for x
    x = 10,935,175,973.04/119,838.69
  6. Step 6: Final answer
    x = 91,249.13

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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.