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Finding the Fourth Proportional to 302,906.70, 454,360.05 and 78,266.70

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Solution

The fourth proportional to 302,906.70, 454,360.05 and 78,266.70 is: 117,400.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,906.70 : 454,360.05 = 78,266.70 : x
  2. Step 2: Convert to fraction form
    302,906.70/454,360.05 = 78,266.70/x
  3. Step 3: Cross multiply
    302,906.70x = 454,360.05 × 78,266.70
  4. Step 4: Simplify right side
    302,906.70x = 35,561,261,725.34
  5. Step 5: Solve for x
    x = 35,561,261,725.34/302,906.70
  6. Step 6: Final answer
    x = 117,400.05

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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.