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Finding the Fourth Proportional to 118,463.16, 163,478.79 and 64,748.16

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Solution

The fourth proportional to 118,463.16, 163,478.79 and 64,748.16 is: 89,352.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,463.16 : 163,478.79 = 64,748.16 : x
  2. Step 2: Convert to fraction form
    118,463.16/163,478.79 = 64,748.16/x
  3. Step 3: Cross multiply
    118,463.16x = 163,478.79 × 64,748.16
  4. Step 4: Simplify right side
    118,463.16x = 10,584,950,851.53
  5. Step 5: Solve for x
    x = 10,584,950,851.53/118,463.16
  6. Step 6: Final answer
    x = 89,352.26

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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.