Home / 137,531.06-189,855.03-86,618.61

Finding the Fourth Proportional to 137,531.06, 189,855.03 and 86,618.61

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Solution

The fourth proportional to 137,531.06, 189,855.03 and 86,618.61 is: 119,572.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,531.06 : 189,855.03 = 86,618.61 : x
  2. Step 2: Convert to fraction form
    137,531.06/189,855.03 = 86,618.61/x
  3. Step 3: Cross multiply
    137,531.06x = 189,855.03 × 86,618.61
  4. Step 4: Simplify right side
    137,531.06x = 16,444,978,800.11
  5. Step 5: Solve for x
    x = 16,444,978,800.11/137,531.06
  6. Step 6: Final answer
    x = 119,572.84

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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.