Home / 57,143.41-85,720.75-19,698.55

Finding the Fourth Proportional to 57,143.41, 85,720.75 and 19,698.55

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Solution

The fourth proportional to 57,143.41, 85,720.75 and 19,698.55 is: 29,549.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,143.41 : 85,720.75 = 19,698.55 : x
  2. Step 2: Convert to fraction form
    57,143.41/85,720.75 = 19,698.55/x
  3. Step 3: Cross multiply
    57,143.41x = 85,720.75 × 19,698.55
  4. Step 4: Simplify right side
    57,143.41x = 1,688,574,479.91
  5. Step 5: Solve for x
    x = 1,688,574,479.91/57,143.41
  6. Step 6: Final answer
    x = 29,549.77

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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.