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Finding the Fourth Proportional to 103,245.52, 154,911.84 and 56,443.72

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Solution

The fourth proportional to 103,245.52, 154,911.84 and 56,443.72 is: 84,689.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,245.52 : 154,911.84 = 56,443.72 : x
  2. Step 2: Convert to fraction form
    103,245.52/154,911.84 = 56,443.72/x
  3. Step 3: Cross multiply
    103,245.52x = 154,911.84 × 56,443.72
  4. Step 4: Simplify right side
    103,245.52x = 8,743,800,521.64
  5. Step 5: Solve for x
    x = 8,743,800,521.64/103,245.52
  6. Step 6: Final answer
    x = 84,689.39

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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.