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Finding the Fourth Proportional to 120,351.52, 166,090.80 and 72,603.84

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Solution

The fourth proportional to 120,351.52, 166,090.80 and 72,603.84 is: 100,196.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,351.52 : 166,090.80 = 72,603.84 : x
  2. Step 2: Convert to fraction form
    120,351.52/166,090.80 = 72,603.84/x
  3. Step 3: Cross multiply
    120,351.52x = 166,090.80 × 72,603.84
  4. Step 4: Simplify right side
    120,351.52x = 12,058,830,763.78
  5. Step 5: Solve for x
    x = 12,058,830,763.78/120,351.52
  6. Step 6: Final answer
    x = 100,196.75

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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.