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Finding the Fourth Proportional to 118,398.21, 163,392.74 and 70,679.26

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Solution

The fourth proportional to 118,398.21, 163,392.74 and 70,679.26 is: 97,539.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,398.21 : 163,392.74 = 70,679.26 : x
  2. Step 2: Convert to fraction form
    118,398.21/163,392.74 = 70,679.26/x
  3. Step 3: Cross multiply
    118,398.21x = 163,392.74 × 70,679.26
  4. Step 4: Simplify right side
    118,398.21x = 11,548,477,952.57
  5. Step 5: Solve for x
    x = 11,548,477,952.57/118,398.21
  6. Step 6: Final answer
    x = 97,539.30

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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.