Home / 143,788.90-198,428.88-80,125.30

Finding the Fourth Proportional to 143,788.90, 198,428.88 and 80,125.30

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Solution

The fourth proportional to 143,788.90, 198,428.88 and 80,125.30 is: 110,573.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,788.90 : 198,428.88 = 80,125.30 : x
  2. Step 2: Convert to fraction form
    143,788.90/198,428.88 = 80,125.30/x
  3. Step 3: Cross multiply
    143,788.90x = 198,428.88 × 80,125.30
  4. Step 4: Simplify right side
    143,788.90x = 15,899,173,538.66
  5. Step 5: Solve for x
    x = 15,899,173,538.66/143,788.90
  6. Step 6: Final answer
    x = 110,573.02

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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.