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Finding the Fourth Proportional to 144,378.81, 216,579.15 and 39,205.98

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Solution

The fourth proportional to 144,378.81, 216,579.15 and 39,205.98 is: 58,811.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,378.81 : 216,579.15 = 39,205.98 : x
  2. Step 2: Convert to fraction form
    144,378.81/216,579.15 = 39,205.98/x
  3. Step 3: Cross multiply
    144,378.81x = 216,579.15 × 39,205.98
  4. Step 4: Simplify right side
    144,378.81x = 8,491,197,823.32
  5. Step 5: Solve for x
    x = 8,491,197,823.32/144,378.81
  6. Step 6: Final answer
    x = 58,811.94

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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.