Home / 142,748.20-214,122.30-89,986.60

Finding the Fourth Proportional to 142,748.20, 214,122.30 and 89,986.60

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Solution

The fourth proportional to 142,748.20, 214,122.30 and 89,986.60 is: 134,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,748.20 : 214,122.30 = 89,986.60 : x
  2. Step 2: Convert to fraction form
    142,748.20/214,122.30 = 89,986.60/x
  3. Step 3: Cross multiply
    142,748.20x = 214,122.30 × 89,986.60
  4. Step 4: Simplify right side
    142,748.20x = 19,268,137,761.18
  5. Step 5: Solve for x
    x = 19,268,137,761.18/142,748.20
  6. Step 6: Final answer
    x = 134,979.90

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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.