Home / 131,910.34-198,130.29-78,706.15

Finding the Fourth Proportional to 131,910.34, 198,130.29 and 78,706.15

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Solution

The fourth proportional to 131,910.34, 198,130.29 and 78,706.15 is: 118,217.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,910.34 : 198,130.29 = 78,706.15 : x
  2. Step 2: Convert to fraction form
    131,910.34/198,130.29 = 78,706.15/x
  3. Step 3: Cross multiply
    131,910.34x = 198,130.29 × 78,706.15
  4. Step 4: Simplify right side
    131,910.34x = 15,594,071,828.96
  5. Step 5: Solve for x
    x = 15,594,071,828.96/131,910.34
  6. Step 6: Final answer
    x = 118,217.21

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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.