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Finding the Fourth Proportional to 257,296.15, 386,000.93 and 86,512.03

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Solution

The fourth proportional to 257,296.15, 386,000.93 and 86,512.03 is: 129,787.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,296.15 : 386,000.93 = 86,512.03 : x
  2. Step 2: Convert to fraction form
    257,296.15/386,000.93 = 86,512.03/x
  3. Step 3: Cross multiply
    257,296.15x = 386,000.93 × 86,512.03
  4. Step 4: Simplify right side
    257,296.15x = 33,393,724,036.19
  5. Step 5: Solve for x
    x = 33,393,724,036.19/257,296.15
  6. Step 6: Final answer
    x = 129,787.11

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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.