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Finding the Fourth Proportional to 171,038.10, 256,557.15 and 86,765.70

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Solution

The fourth proportional to 171,038.10, 256,557.15 and 86,765.70 is: 130,148.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,038.10 : 256,557.15 = 86,765.70 : x
  2. Step 2: Convert to fraction form
    171,038.10/256,557.15 = 86,765.70/x
  3. Step 3: Cross multiply
    171,038.10x = 256,557.15 × 86,765.70
  4. Step 4: Simplify right side
    171,038.10x = 22,260,360,709.76
  5. Step 5: Solve for x
    x = 22,260,360,709.76/171,038.10
  6. Step 6: Final answer
    x = 130,148.55

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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.