Home / 85,509.06-128,265.77-40,519.86

Finding the Fourth Proportional to 85,509.06, 128,265.77 and 40,519.86

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Solution

The fourth proportional to 85,509.06, 128,265.77 and 40,519.86 is: 60,780.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,509.06 : 128,265.77 = 40,519.86 : x
  2. Step 2: Convert to fraction form
    85,509.06/128,265.77 = 40,519.86/x
  3. Step 3: Cross multiply
    85,509.06x = 128,265.77 × 40,519.86
  4. Step 4: Simplify right side
    85,509.06x = 5,197,311,043.19
  5. Step 5: Solve for x
    x = 5,197,311,043.19/85,509.06
  6. Step 6: Final answer
    x = 60,780.82

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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.