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Finding the Fourth Proportional to 119,615.74, 165,068.92 and 65,899.50

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Solution

The fourth proportional to 119,615.74, 165,068.92 and 65,899.50 is: 90,940.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,615.74 : 165,068.92 = 65,899.50 : x
  2. Step 2: Convert to fraction form
    119,615.74/165,068.92 = 65,899.50/x
  3. Step 3: Cross multiply
    119,615.74x = 165,068.92 × 65,899.50
  4. Step 4: Simplify right side
    119,615.74x = 10,877,959,293.54
  5. Step 5: Solve for x
    x = 10,877,959,293.54/119,615.74
  6. Step 6: Final answer
    x = 90,940.87

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1.5x scale

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.