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Finding the Fourth Proportional to 98,337.90, 135,671.31 and 58,031.49

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Solution

The fourth proportional to 98,337.90, 135,671.31 and 58,031.49 is: 80,062.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,337.90 : 135,671.31 = 58,031.49 : x
  2. Step 2: Convert to fraction form
    98,337.90/135,671.31 = 58,031.49/x
  3. Step 3: Cross multiply
    98,337.90x = 135,671.31 × 58,031.49
  4. Step 4: Simplify right side
    98,337.90x = 7,873,208,269.55
  5. Step 5: Solve for x
    x = 7,873,208,269.55/98,337.90
  6. Step 6: Final answer
    x = 80,062.81

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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.