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Finding the Fourth Proportional to 79,885,430.80, 119,828,146.20 and 41,143,381.90

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Solution

The fourth proportional to 79,885,430.80, 119,828,146.20 and 41,143,381.90 is: 61,715,072.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,885,430.80 : 119,828,146.20 = 41,143,381.90 : x
  2. Step 2: Convert to fraction form
    79,885,430.80/119,828,146.20 = 41,143,381.90/x
  3. Step 3: Cross multiply
    79,885,430.80x = 119,828,146.20 × 41,143,381.90
  4. Step 4: Simplify right side
    79,885,430.80x = 4,930,135,181,475,634
  5. Step 5: Solve for x
    x = 4,930,135,181,475,634/79,885,430.80
  6. Step 6: Final answer
    x = 61,715,072.85

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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.