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Finding the Fourth Proportional to 171,208.81, 256,438.72 and 86,823.55

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Solution

The fourth proportional to 171,208.81, 256,438.72 and 86,823.55 is: 130,045.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,208.81 : 256,438.72 = 86,823.55 : x
  2. Step 2: Convert to fraction form
    171,208.81/256,438.72 = 86,823.55/x
  3. Step 3: Cross multiply
    171,208.81x = 256,438.72 × 86,823.55
  4. Step 4: Simplify right side
    171,208.81x = 22,264,920,027.86
  5. Step 5: Solve for x
    x = 22,264,920,027.86/171,208.81
  6. Step 6: Final answer
    x = 130,045.41

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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.