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Finding the Fourth Proportional to 119,730.71, 165,229.53 and 66,017.86

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Solution

The fourth proportional to 119,730.71, 165,229.53 and 66,017.86 is: 91,105.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,730.71 : 165,229.53 = 66,017.86 : x
  2. Step 2: Convert to fraction form
    119,730.71/165,229.53 = 66,017.86/x
  3. Step 3: Cross multiply
    119,730.71x = 165,229.53 × 66,017.86
  4. Step 4: Simplify right side
    119,730.71x = 10,908,099,979.41
  5. Step 5: Solve for x
    x = 10,908,099,979.41/119,730.71
  6. Step 6: Final answer
    x = 91,105.28

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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.