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Finding the Fourth Proportional to 119,854.84, 165,399.53 and 66,139.86

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Solution

The fourth proportional to 119,854.84, 165,399.53 and 66,139.86 is: 91,272.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,854.84 : 165,399.53 = 66,139.86 : x
  2. Step 2: Convert to fraction form
    119,854.84/165,399.53 = 66,139.86/x
  3. Step 3: Cross multiply
    119,854.84x = 165,399.53 × 66,139.86
  4. Step 4: Simplify right side
    119,854.84x = 10,939,501,758.27
  5. Step 5: Solve for x
    x = 10,939,501,758.27/119,854.84
  6. Step 6: Final answer
    x = 91,272.92

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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.