Home / 120,729.29-166,530.74-77,764.46

Finding the Fourth Proportional to 120,729.29, 166,530.74 and 77,764.46

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Solution

The fourth proportional to 120,729.29, 166,530.74 and 77,764.46 is: 107,266.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,729.29 : 166,530.74 = 77,764.46 : x
  2. Step 2: Convert to fraction form
    120,729.29/166,530.74 = 77,764.46/x
  3. Step 3: Cross multiply
    120,729.29x = 166,530.74 × 77,764.46
  4. Step 4: Simplify right side
    120,729.29x = 12,950,171,848.02
  5. Step 5: Solve for x
    x = 12,950,171,848.02/120,729.29
  6. Step 6: Final answer
    x = 107,266.20

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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.