Home / 120,945.36-166,979.16-77,940

Finding the Fourth Proportional to 120,945.36, 166,979.16 and 77,940

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Solution

The fourth proportional to 120,945.36, 166,979.16 and 77,940 is: 107,605.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,945.36 : 166,979.16 = 77,940 : x
  2. Step 2: Convert to fraction form
    120,945.36/166,979.16 = 77,940/x
  3. Step 3: Cross multiply
    120,945.36x = 166,979.16 × 77,940
  4. Step 4: Simplify right side
    120,945.36x = 13,014,355,730.40
  5. Step 5: Solve for x
    x = 13,014,355,730.40/120,945.36
  6. Step 6: Final answer
    x = 107,605.25

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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.