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Finding the Fourth Proportional to 78,755,770.80, 118,098,226.80 and 30,217,492.80

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Solution

The fourth proportional to 78,755,770.80, 118,098,226.80 and 30,217,492.80 is: 45,312,645.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,755,770.80 : 118,098,226.80 = 30,217,492.80 : x
  2. Step 2: Convert to fraction form
    78,755,770.80/118,098,226.80 = 30,217,492.80/x
  3. Step 3: Cross multiply
    78,755,770.80x = 118,098,226.80 × 30,217,492.80
  4. Step 4: Simplify right side
    78,755,770.80x = 3,568,632,318,021,767
  5. Step 5: Solve for x
    x = 3,568,632,318,021,767/78,755,770.80
  6. Step 6: Final answer
    x = 45,312,645.43

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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.