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Finding the Fourth Proportional to 258,065.66, 387,153.80 and 89,591.34

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Solution

The fourth proportional to 258,065.66, 387,153.80 and 89,591.34 is: 134,406.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,065.66 : 387,153.80 = 89,591.34 : x
  2. Step 2: Convert to fraction form
    258,065.66/387,153.80 = 89,591.34/x
  3. Step 3: Cross multiply
    258,065.66x = 387,153.80 × 89,591.34
  4. Step 4: Simplify right side
    258,065.66x = 34,685,627,728.09
  5. Step 5: Solve for x
    x = 34,685,627,728.09/258,065.66
  6. Step 6: Final answer
    x = 134,406.21

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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.