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Finding the Fourth Proportional to 118,195.88, 163,113.21 and 64,485.99

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Solution

The fourth proportional to 118,195.88, 163,113.21 and 64,485.99 is: 88,992.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,195.88 : 163,113.21 = 64,485.99 : x
  2. Step 2: Convert to fraction form
    118,195.88/163,113.21 = 64,485.99/x
  3. Step 3: Cross multiply
    118,195.88x = 163,113.21 × 64,485.99
  4. Step 4: Simplify right side
    118,195.88x = 10,518,516,828.93
  5. Step 5: Solve for x
    x = 10,518,516,828.93/118,195.88
  6. Step 6: Final answer
    x = 88,992.25

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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.