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Finding the Fourth Proportional to 120,085.91, 165,708.59 and 66,370.93

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Solution

The fourth proportional to 120,085.91, 165,708.59 and 66,370.93 is: 91,586.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,085.91 : 165,708.59 = 66,370.93 : x
  2. Step 2: Convert to fraction form
    120,085.91/165,708.59 = 66,370.93/x
  3. Step 3: Cross multiply
    120,085.91x = 165,708.59 × 66,370.93
  4. Step 4: Simplify right side
    120,085.91x = 10,998,232,481.16
  5. Step 5: Solve for x
    x = 10,998,232,481.16/120,085.91
  6. Step 6: Final answer
    x = 91,586.37

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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.