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Finding the Fourth Proportional to 291,125.25, 436,688.08 and 80,763.39

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Solution

The fourth proportional to 291,125.25, 436,688.08 and 80,763.39 is: 121,145.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,125.25 : 436,688.08 = 80,763.39 : x
  2. Step 2: Convert to fraction form
    291,125.25/436,688.08 = 80,763.39/x
  3. Step 3: Cross multiply
    291,125.25x = 436,688.08 × 80,763.39
  4. Step 4: Simplify right side
    291,125.25x = 35,268,409,511.48
  5. Step 5: Solve for x
    x = 35,268,409,511.48/291,125.25
  6. Step 6: Final answer
    x = 121,145.14

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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.