Home / 85,757.40-128,778.66-57,856.95

Finding the Fourth Proportional to 85,757.40, 128,778.66 and 57,856.95

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Solution

The fourth proportional to 85,757.40, 128,778.66 and 57,856.95 is: 86,881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,757.40 : 128,778.66 = 57,856.95 : x
  2. Step 2: Convert to fraction form
    85,757.40/128,778.66 = 57,856.95/x
  3. Step 3: Cross multiply
    85,757.40x = 128,778.66 × 57,856.95
  4. Step 4: Simplify right side
    85,757.40x = 7,450,740,492.69
  5. Step 5: Solve for x
    x = 7,450,740,492.69/85,757.40
  6. Step 6: Final answer
    x = 86,881.60

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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.