Home / 120,386.36-166,078.05-77,958.56

Finding the Fourth Proportional to 120,386.36, 166,078.05 and 77,958.56

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Solution

The fourth proportional to 120,386.36, 166,078.05 and 77,958.56 is: 107,547.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,386.36 : 166,078.05 = 77,958.56 : x
  2. Step 2: Convert to fraction form
    120,386.36/166,078.05 = 77,958.56/x
  3. Step 3: Cross multiply
    120,386.36x = 166,078.05 × 77,958.56
  4. Step 4: Simplify right side
    120,386.36x = 12,947,204,795.22
  5. Step 5: Solve for x
    x = 12,947,204,795.22/120,386.36
  6. Step 6: Final answer
    x = 107,547.11

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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.