Home / 142,671.74-196,879.14-78,128.44

Finding the Fourth Proportional to 142,671.74, 196,879.14 and 78,128.44

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Solution

The fourth proportional to 142,671.74, 196,879.14 and 78,128.44 is: 107,812.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,671.74 : 196,879.14 = 78,128.44 : x
  2. Step 2: Convert to fraction form
    142,671.74/196,879.14 = 78,128.44/x
  3. Step 3: Cross multiply
    142,671.74x = 196,879.14 × 78,128.44
  4. Step 4: Simplify right side
    142,671.74x = 15,381,860,883.16
  5. Step 5: Solve for x
    x = 15,381,860,883.16/142,671.74
  6. Step 6: Final answer
    x = 107,812.95

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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.