Home / 120,386.11-166,077.70-77,958.31

Finding the Fourth Proportional to 120,386.11, 166,077.70 and 77,958.31

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Solution

The fourth proportional to 120,386.11, 166,077.70 and 77,958.31 is: 107,546.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,386.11 : 166,077.70 = 77,958.31 : x
  2. Step 2: Convert to fraction form
    120,386.11/166,077.70 = 77,958.31/x
  3. Step 3: Cross multiply
    120,386.11x = 166,077.70 × 77,958.31
  4. Step 4: Simplify right side
    120,386.11x = 12,947,136,820.69
  5. Step 5: Solve for x
    x = 12,947,136,820.69/120,386.11
  6. Step 6: Final answer
    x = 107,546.77

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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.