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Finding the Fourth Proportional to 155,101.20, 214,041.60 and 91,435.20

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Solution

The fourth proportional to 155,101.20, 214,041.60 and 91,435.20 is: 126,181.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,101.20 : 214,041.60 = 91,435.20 : x
  2. Step 2: Convert to fraction form
    155,101.20/214,041.60 = 91,435.20/x
  3. Step 3: Cross multiply
    155,101.20x = 214,041.60 × 91,435.20
  4. Step 4: Simplify right side
    155,101.20x = 19,570,936,504.32
  5. Step 5: Solve for x
    x = 19,570,936,504.32/155,101.20
  6. Step 6: Final answer
    x = 126,181.72

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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.