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Finding the Fourth Proportional to 141,930, 212,895 and 79,605.36

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Solution

The fourth proportional to 141,930, 212,895 and 79,605.36 is: 119,408.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,930 : 212,895 = 79,605.36 : x
  2. Step 2: Convert to fraction form
    141,930/212,895 = 79,605.36/x
  3. Step 3: Cross multiply
    141,930x = 212,895 × 79,605.36
  4. Step 4: Simplify right side
    141,930x = 16,947,583,117.20
  5. Step 5: Solve for x
    x = 16,947,583,117.20/141,930
  6. Step 6: Final answer
    x = 119,408.04

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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.