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Finding the Fourth Proportional to 170,688.60, 256,032.90 and 86,707.80

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Solution

The fourth proportional to 170,688.60, 256,032.90 and 86,707.80 is: 130,061.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,688.60 : 256,032.90 = 86,707.80 : x
  2. Step 2: Convert to fraction form
    170,688.60/256,032.90 = 86,707.80/x
  3. Step 3: Cross multiply
    170,688.60x = 256,032.90 × 86,707.80
  4. Step 4: Simplify right side
    170,688.60x = 22,200,049,486.62
  5. Step 5: Solve for x
    x = 22,200,049,486.62/170,688.60
  6. Step 6: Final answer
    x = 130,061.70

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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.