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Finding the Fourth Proportional to 168,720.76, 232,805.90 and 100,765

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Solution

The fourth proportional to 168,720.76, 232,805.90 and 100,765 is: 139,038.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,720.76 : 232,805.90 = 100,765 : x
  2. Step 2: Convert to fraction form
    168,720.76/232,805.90 = 100,765/x
  3. Step 3: Cross multiply
    168,720.76x = 232,805.90 × 100,765
  4. Step 4: Simplify right side
    168,720.76x = 23,458,686,513.50
  5. Step 5: Solve for x
    x = 23,458,686,513.50/168,720.76
  6. Step 6: Final answer
    x = 139,038.53

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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.