Home / 86,986.80-120,059.28-56,777.04

Finding the Fourth Proportional to 86,986.80, 120,059.28 and 56,777.04

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Solution

The fourth proportional to 86,986.80, 120,059.28 and 56,777.04 is: 78,363.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,986.80 : 120,059.28 = 56,777.04 : x
  2. Step 2: Convert to fraction form
    86,986.80/120,059.28 = 56,777.04/x
  3. Step 3: Cross multiply
    86,986.80x = 120,059.28 × 56,777.04
  4. Step 4: Simplify right side
    86,986.80x = 6,816,610,542.93
  5. Step 5: Solve for x
    x = 6,816,610,542.93/86,986.80
  6. Step 6: Final answer
    x = 78,363.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.