Home / 131,513.18-197,319.43-78,959.30

Finding the Fourth Proportional to 131,513.18, 197,319.43 and 78,959.30

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Solution

The fourth proportional to 131,513.18, 197,319.43 and 78,959.30 is: 118,468.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,513.18 : 197,319.43 = 78,959.30 : x
  2. Step 2: Convert to fraction form
    131,513.18/197,319.43 = 78,959.30/x
  3. Step 3: Cross multiply
    131,513.18x = 197,319.43 × 78,959.30
  4. Step 4: Simplify right side
    131,513.18x = 15,580,204,069.20
  5. Step 5: Solve for x
    x = 15,580,204,069.20/131,513.18
  6. Step 6: Final answer
    x = 118,468.77

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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.