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Finding the Fourth Proportional to 131,777.80, 197,205.90 and 120,718.60

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Solution

The fourth proportional to 131,777.80, 197,205.90 and 120,718.60 is: 180,655.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,777.80 : 197,205.90 = 120,718.60 : x
  2. Step 2: Convert to fraction form
    131,777.80/197,205.90 = 120,718.60/x
  3. Step 3: Cross multiply
    131,777.80x = 197,205.90 × 120,718.60
  4. Step 4: Simplify right side
    131,777.80x = 23,806,420,159.74
  5. Step 5: Solve for x
    x = 23,806,420,159.74/131,777.80
  6. Step 6: Final answer
    x = 180,655.77

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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.