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Finding the Fourth Proportional to 120,603.80, 166,434.18 and 66,885.80

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Solution

The fourth proportional to 120,603.80, 166,434.18 and 66,885.80 is: 92,302.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,603.80 : 166,434.18 = 66,885.80 : x
  2. Step 2: Convert to fraction form
    120,603.80/166,434.18 = 66,885.80/x
  3. Step 3: Cross multiply
    120,603.80x = 166,434.18 × 66,885.80
  4. Step 4: Simplify right side
    120,603.80x = 11,132,083,276.64
  5. Step 5: Solve for x
    x = 11,132,083,276.64/120,603.80
  6. Step 6: Final answer
    x = 92,302.92

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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.