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Finding the Fourth Proportional to 120,035.71, 165,655.92 and 66,319.57

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Solution

The fourth proportional to 120,035.71, 165,655.92 and 66,319.57 is: 91,524.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,035.71 : 165,655.92 = 66,319.57 : x
  2. Step 2: Convert to fraction form
    120,035.71/165,655.92 = 66,319.57/x
  3. Step 3: Cross multiply
    120,035.71x = 165,655.92 × 66,319.57
  4. Step 4: Simplify right side
    120,035.71x = 10,986,228,222.48
  5. Step 5: Solve for x
    x = 10,986,228,222.48/120,035.71
  6. Step 6: Final answer
    x = 91,524.67

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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.