Home / 120,318.92-166,038.10-66,602.80

Finding the Fourth Proportional to 120,318.92, 166,038.10 and 66,602.80

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Solution

The fourth proportional to 120,318.92, 166,038.10 and 66,602.80 is: 91,910.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,318.92 : 166,038.10 = 66,602.80 : x
  2. Step 2: Convert to fraction form
    120,318.92/166,038.10 = 66,602.80/x
  3. Step 3: Cross multiply
    120,318.92x = 166,038.10 × 66,602.80
  4. Step 4: Simplify right side
    120,318.92x = 11,058,602,366.68
  5. Step 5: Solve for x
    x = 11,058,602,366.68/120,318.92
  6. Step 6: Final answer
    x = 91,910.75

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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.