Home / 131,320.80-196,981.20-78,832.80

Finding the Fourth Proportional to 131,320.80, 196,981.20 and 78,832.80

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Solution

The fourth proportional to 131,320.80, 196,981.20 and 78,832.80 is: 118,249.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,320.80 : 196,981.20 = 78,832.80 : x
  2. Step 2: Convert to fraction form
    131,320.80/196,981.20 = 78,832.80/x
  3. Step 3: Cross multiply
    131,320.80x = 196,981.20 × 78,832.80
  4. Step 4: Simplify right side
    131,320.80x = 15,528,579,543.36
  5. Step 5: Solve for x
    x = 15,528,579,543.36/131,320.80
  6. Step 6: Final answer
    x = 118,249.20

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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.