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Finding the Fourth Proportional to 120,699.03, 166,540.41 and 72,955.08

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Solution

The fourth proportional to 120,699.03, 166,540.41 and 72,955.08 is: 100,663.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,699.03 : 166,540.41 = 72,955.08 : x
  2. Step 2: Convert to fraction form
    120,699.03/166,540.41 = 72,955.08/x
  3. Step 3: Cross multiply
    120,699.03x = 166,540.41 × 72,955.08
  4. Step 4: Simplify right side
    120,699.03x = 12,149,968,934.78
  5. Step 5: Solve for x
    x = 12,149,968,934.78/120,699.03
  6. Step 6: Final answer
    x = 100,663.35

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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.