Home / 142,651.37-196,856.49-78,987.80

Finding the Fourth Proportional to 142,651.37, 196,856.49 and 78,987.80

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Solution

The fourth proportional to 142,651.37, 196,856.49 and 78,987.80 is: 109,001.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,651.37 : 196,856.49 = 78,987.80 : x
  2. Step 2: Convert to fraction form
    142,651.37/196,856.49 = 78,987.80/x
  3. Step 3: Cross multiply
    142,651.37x = 196,856.49 × 78,987.80
  4. Step 4: Simplify right side
    142,651.37x = 15,549,261,552.96
  5. Step 5: Solve for x
    x = 15,549,261,552.96/142,651.37
  6. Step 6: Final answer
    x = 109,001.84

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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.