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Finding the Fourth Proportional to 153,993.15, 230,768.60 and 90,663.71

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Solution

The fourth proportional to 153,993.15, 230,768.60 and 90,663.71 is: 135,865.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,993.15 : 230,768.60 = 90,663.71 : x
  2. Step 2: Convert to fraction form
    153,993.15/230,768.60 = 90,663.71/x
  3. Step 3: Cross multiply
    153,993.15x = 230,768.60 × 90,663.71
  4. Step 4: Simplify right side
    153,993.15x = 20,922,335,820.34
  5. Step 5: Solve for x
    x = 20,922,335,820.34/153,993.15
  6. Step 6: Final answer
    x = 135,865.37

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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.