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Finding the Fourth Proportional to 86,298, 119,029.89 and 57,603.19

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Solution

The fourth proportional to 86,298, 119,029.89 and 57,603.19 is: 79,451.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,298 : 119,029.89 = 57,603.19 : x
  2. Step 2: Convert to fraction form
    86,298/119,029.89 = 57,603.19/x
  3. Step 3: Cross multiply
    86,298x = 119,029.89 × 57,603.19
  4. Step 4: Simplify right side
    86,298x = 6,856,501,071.77
  5. Step 5: Solve for x
    x = 6,856,501,071.77/86,298
  6. Step 6: Final answer
    x = 79,451.45

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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.