Home / 131,630.30-197,445.45-78,486.20

Finding the Fourth Proportional to 131,630.30, 197,445.45 and 78,486.20

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Solution

The fourth proportional to 131,630.30, 197,445.45 and 78,486.20 is: 117,729.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,630.30 : 197,445.45 = 78,486.20 : x
  2. Step 2: Convert to fraction form
    131,630.30/197,445.45 = 78,486.20/x
  3. Step 3: Cross multiply
    131,630.30x = 197,445.45 × 78,486.20
  4. Step 4: Simplify right side
    131,630.30x = 15,496,743,077.79
  5. Step 5: Solve for x
    x = 15,496,743,077.79/131,630.30
  6. Step 6: Final answer
    x = 117,729.30

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1.5x scale

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.