Home / 107,706.91-161,319.79-78,056.66

Finding the Fourth Proportional to 107,706.91, 161,319.79 and 78,056.66

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Solution

The fourth proportional to 107,706.91, 161,319.79 and 78,056.66 is: 116,910.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,706.91 : 161,319.79 = 78,056.66 : x
  2. Step 2: Convert to fraction form
    107,706.91/161,319.79 = 78,056.66/x
  3. Step 3: Cross multiply
    107,706.91x = 161,319.79 × 78,056.66
  4. Step 4: Simplify right side
    107,706.91x = 12,592,083,192.70
  5. Step 5: Solve for x
    x = 12,592,083,192.70/107,706.91
  6. Step 6: Final answer
    x = 116,910.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.