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Finding the Fourth Proportional to 303,434.55, 455,151.83 and 78,793.20

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Solution

The fourth proportional to 303,434.55, 455,151.83 and 78,793.20 is: 118,189.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,434.55 : 455,151.83 = 78,793.20 : x
  2. Step 2: Convert to fraction form
    303,434.55/455,151.83 = 78,793.20/x
  3. Step 3: Cross multiply
    303,434.55x = 455,151.83 × 78,793.20
  4. Step 4: Simplify right side
    303,434.55x = 35,862,868,777.59
  5. Step 5: Solve for x
    x = 35,862,868,777.59/303,434.55
  6. Step 6: Final answer
    x = 118,189.80

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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.