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Finding the Fourth Proportional to 291,132.39, 436,698.77 and 80,770.53

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Solution

The fourth proportional to 291,132.39, 436,698.77 and 80,770.53 is: 121,155.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,132.39 : 436,698.77 = 80,770.53 : x
  2. Step 2: Convert to fraction form
    291,132.39/436,698.77 = 80,770.53/x
  3. Step 3: Cross multiply
    291,132.39x = 436,698.77 × 80,770.53
  4. Step 4: Simplify right side
    291,132.39x = 35,272,390,699.40
  5. Step 5: Solve for x
    x = 35,272,390,699.40/291,132.39
  6. Step 6: Final answer
    x = 121,155.84

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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.