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Finding the Fourth Proportional to 86,618.74, 119,648.61 and 69,686.77

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Solution

The fourth proportional to 86,618.74, 119,648.61 and 69,686.77 is: 96,260.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,618.74 : 119,648.61 = 69,686.77 : x
  2. Step 2: Convert to fraction form
    86,618.74/119,648.61 = 69,686.77/x
  3. Step 3: Cross multiply
    86,618.74x = 119,648.61 × 69,686.77
  4. Step 4: Simplify right side
    86,618.74x = 8,337,925,165.89
  5. Step 5: Solve for x
    x = 8,337,925,165.89/86,618.74
  6. Step 6: Final answer
    x = 96,260.06

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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.