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Finding the Fourth Proportional to 291,187.47, 436,783.65 and 80,841.81

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Solution

The fourth proportional to 291,187.47, 436,783.65 and 80,841.81 is: 121,263.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,187.47 : 436,783.65 = 80,841.81 : x
  2. Step 2: Convert to fraction form
    291,187.47/436,783.65 = 80,841.81/x
  3. Step 3: Cross multiply
    291,187.47x = 436,783.65 × 80,841.81
  4. Step 4: Simplify right side
    291,187.47x = 35,310,380,844.41
  5. Step 5: Solve for x
    x = 35,310,380,844.41/291,187.47
  6. Step 6: Final answer
    x = 121,263.39

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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.