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Finding the Fourth Proportional to 118,468.19, 163,485.70 and 64,753.18

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Solution

The fourth proportional to 118,468.19, 163,485.70 and 64,753.18 is: 89,359.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,468.19 : 163,485.70 = 64,753.18 : x
  2. Step 2: Convert to fraction form
    118,468.19/163,485.70 = 64,753.18/x
  3. Step 3: Cross multiply
    118,468.19x = 163,485.70 × 64,753.18
  4. Step 4: Simplify right side
    118,468.19x = 10,586,218,388.93
  5. Step 5: Solve for x
    x = 10,586,218,388.93/118,468.19
  6. Step 6: Final answer
    x = 89,359.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.