Home / 142,743.20-214,114.80-89,981.60

Finding the Fourth Proportional to 142,743.20, 214,114.80 and 89,981.60

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Solution

The fourth proportional to 142,743.20, 214,114.80 and 89,981.60 is: 134,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,743.20 : 214,114.80 = 89,981.60 : x
  2. Step 2: Convert to fraction form
    142,743.20/214,114.80 = 89,981.60/x
  3. Step 3: Cross multiply
    142,743.20x = 214,114.80 × 89,981.60
  4. Step 4: Simplify right side
    142,743.20x = 19,266,392,287.68
  5. Step 5: Solve for x
    x = 19,266,392,287.68/142,743.20
  6. Step 6: Final answer
    x = 134,972.40

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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.