Home / 131,186.20-196,779.30-78,698.20

Finding the Fourth Proportional to 131,186.20, 196,779.30 and 78,698.20

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Solution

The fourth proportional to 131,186.20, 196,779.30 and 78,698.20 is: 118,047.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,186.20 : 196,779.30 = 78,698.20 : x
  2. Step 2: Convert to fraction form
    131,186.20/196,779.30 = 78,698.20/x
  3. Step 3: Cross multiply
    131,186.20x = 196,779.30 × 78,698.20
  4. Step 4: Simplify right side
    131,186.20x = 15,486,176,707.26
  5. Step 5: Solve for x
    x = 15,486,176,707.26/131,186.20
  6. Step 6: Final answer
    x = 118,047.30

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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.