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Finding the Fourth Proportional to 219,037.70, 328,597.11 and 69,315.68

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Solution

The fourth proportional to 219,037.70, 328,597.11 and 69,315.68 is: 103,986.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,037.70 : 328,597.11 = 69,315.68 : x
  2. Step 2: Convert to fraction form
    219,037.70/328,597.11 = 69,315.68/x
  3. Step 3: Cross multiply
    219,037.70x = 328,597.11 × 69,315.68
  4. Step 4: Simplify right side
    219,037.70x = 22,776,932,125.68
  5. Step 5: Solve for x
    x = 22,776,932,125.68/219,037.70
  6. Step 6: Final answer
    x = 103,986.36

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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.