Home / 131,521.18-197,331.43-78,967.30

Finding the Fourth Proportional to 131,521.18, 197,331.43 and 78,967.30

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Solution

The fourth proportional to 131,521.18, 197,331.43 and 78,967.30 is: 118,480.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,521.18 : 197,331.43 = 78,967.30 : x
  2. Step 2: Convert to fraction form
    131,521.18/197,331.43 = 78,967.30/x
  3. Step 3: Cross multiply
    131,521.18x = 197,331.43 × 78,967.30
  4. Step 4: Simplify right side
    131,521.18x = 15,582,730,232.24
  5. Step 5: Solve for x
    x = 15,582,730,232.24/131,521.18
  6. Step 6: Final answer
    x = 118,480.77

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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.