Home / 131,447.18-197,086.70-78,124.93

Finding the Fourth Proportional to 131,447.18, 197,086.70 and 78,124.93

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Solution

The fourth proportional to 131,447.18, 197,086.70 and 78,124.93 is: 117,137.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,447.18 : 197,086.70 = 78,124.93 : x
  2. Step 2: Convert to fraction form
    131,447.18/197,086.70 = 78,124.93/x
  3. Step 3: Cross multiply
    131,447.18x = 197,086.70 × 78,124.93
  4. Step 4: Simplify right side
    131,447.18x = 15,397,384,051.06
  5. Step 5: Solve for x
    x = 15,397,384,051.06/131,447.18
  6. Step 6: Final answer
    x = 117,137.43

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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.