Home / 85,578.20-128,280.90-38,864.60

Finding the Fourth Proportional to 85,578.20, 128,280.90 and 38,864.60

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Solution

The fourth proportional to 85,578.20, 128,280.90 and 38,864.60 is: 58,257.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,578.20 : 128,280.90 = 38,864.60 : x
  2. Step 2: Convert to fraction form
    85,578.20/128,280.90 = 38,864.60/x
  3. Step 3: Cross multiply
    85,578.20x = 128,280.90 × 38,864.60
  4. Step 4: Simplify right side
    85,578.20x = 4,985,585,866.14
  5. Step 5: Solve for x
    x = 4,985,585,866.14/85,578.20
  6. Step 6: Final answer
    x = 58,257.66

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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.