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Finding the Fourth Proportional to 144,790.40, 217,178.40 and 74,676.80

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Solution

The fourth proportional to 144,790.40, 217,178.40 and 74,676.80 is: 112,011.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,790.40 : 217,178.40 = 74,676.80 : x
  2. Step 2: Convert to fraction form
    144,790.40/217,178.40 = 74,676.80/x
  3. Step 3: Cross multiply
    144,790.40x = 217,178.40 × 74,676.80
  4. Step 4: Simplify right side
    144,790.40x = 16,218,187,941.12
  5. Step 5: Solve for x
    x = 16,218,187,941.12/144,790.40
  6. Step 6: Final answer
    x = 112,011.49

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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.