Home / 142,115.18-196,113.80-78,451.61

Finding the Fourth Proportional to 142,115.18, 196,113.80 and 78,451.61

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Solution

The fourth proportional to 142,115.18, 196,113.80 and 78,451.61 is: 108,260.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,115.18 : 196,113.80 = 78,451.61 : x
  2. Step 2: Convert to fraction form
    142,115.18/196,113.80 = 78,451.61/x
  3. Step 3: Cross multiply
    142,115.18x = 196,113.80 × 78,451.61
  4. Step 4: Simplify right side
    142,115.18x = 15,385,441,980.39
  5. Step 5: Solve for x
    x = 15,385,441,980.39/142,115.18
  6. Step 6: Final answer
    x = 108,260.37

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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.