Home / 101,987.20-140,737.76-56,668.36

Finding the Fourth Proportional to 101,987.20, 140,737.76 and 56,668.36

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Solution

The fourth proportional to 101,987.20, 140,737.76 and 56,668.36 is: 78,199.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,987.20 : 140,737.76 = 56,668.36 : x
  2. Step 2: Convert to fraction form
    101,987.20/140,737.76 = 56,668.36/x
  3. Step 3: Cross multiply
    101,987.20x = 140,737.76 × 56,668.36
  4. Step 4: Simplify right side
    101,987.20x = 7,975,378,049.27
  5. Step 5: Solve for x
    x = 7,975,378,049.27/101,987.20
  6. Step 6: Final answer
    x = 78,199.79

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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.