Home / 142,018.08-195,987.22-78,355.84

Finding the Fourth Proportional to 142,018.08, 195,987.22 and 78,355.84

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Solution

The fourth proportional to 142,018.08, 195,987.22 and 78,355.84 is: 108,132.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,018.08 : 195,987.22 = 78,355.84 : x
  2. Step 2: Convert to fraction form
    142,018.08/195,987.22 = 78,355.84/x
  3. Step 3: Cross multiply
    142,018.08x = 195,987.22 × 78,355.84
  4. Step 4: Simplify right side
    142,018.08x = 15,356,743,252.36
  5. Step 5: Solve for x
    x = 15,356,743,252.36/142,018.08
  6. Step 6: Final answer
    x = 108,132.31

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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.