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Finding the Fourth Proportional to 118,315.48, 163,275.42 and 68,011.48

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Solution

The fourth proportional to 118,315.48, 163,275.42 and 68,011.48 is: 93,855.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,315.48 : 163,275.42 = 68,011.48 : x
  2. Step 2: Convert to fraction form
    118,315.48/163,275.42 = 68,011.48/x
  3. Step 3: Cross multiply
    118,315.48x = 163,275.42 × 68,011.48
  4. Step 4: Simplify right side
    118,315.48x = 11,104,602,961.82
  5. Step 5: Solve for x
    x = 11,104,602,961.82/118,315.48
  6. Step 6: Final answer
    x = 93,855.88

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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.