Home / 120,143.18-165,809.67-66,432.26

Finding the Fourth Proportional to 120,143.18, 165,809.67 and 66,432.26

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Solution

The fourth proportional to 120,143.18, 165,809.67 and 66,432.26 is: 91,683.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,143.18 : 165,809.67 = 66,432.26 : x
  2. Step 2: Convert to fraction form
    120,143.18/165,809.67 = 66,432.26/x
  3. Step 3: Cross multiply
    120,143.18x = 165,809.67 × 66,432.26
  4. Step 4: Simplify right side
    120,143.18x = 11,015,111,107.95
  5. Step 5: Solve for x
    x = 11,015,111,107.95/120,143.18
  6. Step 6: Final answer
    x = 91,683.20

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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.