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Finding the Fourth Proportional to 98,699.94, 136,195.29 and 58,415.40

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Solution

The fourth proportional to 98,699.94, 136,195.29 and 58,415.40 is: 80,606.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,699.94 : 136,195.29 = 58,415.40 : x
  2. Step 2: Convert to fraction form
    98,699.94/136,195.29 = 58,415.40/x
  3. Step 3: Cross multiply
    98,699.94x = 136,195.29 × 58,415.40
  4. Step 4: Simplify right side
    98,699.94x = 7,955,902,343.47
  5. Step 5: Solve for x
    x = 7,955,902,343.47/98,699.94
  6. Step 6: Final answer
    x = 80,606.96

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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.