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Finding the Fourth Proportional to 120,087.77, 165,729.70 and 66,371.63

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Solution

The fourth proportional to 120,087.77, 165,729.70 and 66,371.63 is: 91,597.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,087.77 : 165,729.70 = 66,371.63 : x
  2. Step 2: Convert to fraction form
    120,087.77/165,729.70 = 66,371.63/x
  3. Step 3: Cross multiply
    120,087.77x = 165,729.70 × 66,371.63
  4. Step 4: Simplify right side
    120,087.77x = 10,999,750,328.41
  5. Step 5: Solve for x
    x = 10,999,750,328.41/120,087.77
  6. Step 6: Final answer
    x = 91,597.59

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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.