Home / 143,065.22-197,416.49-85,703.58

Finding the Fourth Proportional to 143,065.22, 197,416.49 and 85,703.58

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Solution

The fourth proportional to 143,065.22, 197,416.49 and 85,703.58 is: 118,262.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,065.22 : 197,416.49 = 85,703.58 : x
  2. Step 2: Convert to fraction form
    143,065.22/197,416.49 = 85,703.58/x
  3. Step 3: Cross multiply
    143,065.22x = 197,416.49 × 85,703.58
  4. Step 4: Simplify right side
    143,065.22x = 16,919,299,515.52
  5. Step 5: Solve for x
    x = 16,919,299,515.52/143,065.22
  6. Step 6: Final answer
    x = 118,262.85

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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.