Home / 120,143.22-180,288.95-61,021.32

Finding the Fourth Proportional to 120,143.22, 180,288.95 and 61,021.32

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Solution

The fourth proportional to 120,143.22, 180,288.95 and 61,021.32 is: 91,569.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,143.22 : 180,288.95 = 61,021.32 : x
  2. Step 2: Convert to fraction form
    120,143.22/180,288.95 = 61,021.32/x
  3. Step 3: Cross multiply
    120,143.22x = 180,288.95 × 61,021.32
  4. Step 4: Simplify right side
    120,143.22x = 11,001,469,405.31
  5. Step 5: Solve for x
    x = 11,001,469,405.31/120,143.22
  6. Step 6: Final answer
    x = 91,569.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.