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Finding the Fourth Proportional to 98,940.72, 136,531.32 and 58,652.40

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Solution

The fourth proportional to 98,940.72, 136,531.32 and 58,652.40 is: 80,936.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,940.72 : 136,531.32 = 58,652.40 : x
  2. Step 2: Convert to fraction form
    98,940.72/136,531.32 = 58,652.40/x
  3. Step 3: Cross multiply
    98,940.72x = 136,531.32 × 58,652.40
  4. Step 4: Simplify right side
    98,940.72x = 8,007,889,593.17
  5. Step 5: Solve for x
    x = 8,007,889,593.17/98,940.72
  6. Step 6: Final answer
    x = 80,936.24

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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.