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Finding the Fourth Proportional to 68,790.47, 103,185.72 and 45,411.44

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Solution

The fourth proportional to 68,790.47, 103,185.72 and 45,411.44 is: 68,117.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,790.47 : 103,185.72 = 45,411.44 : x
  2. Step 2: Convert to fraction form
    68,790.47/103,185.72 = 45,411.44/x
  3. Step 3: Cross multiply
    68,790.47x = 103,185.72 × 45,411.44
  4. Step 4: Simplify right side
    68,790.47x = 4,685,811,616.71
  5. Step 5: Solve for x
    x = 4,685,811,616.71/68,790.47
  6. Step 6: Final answer
    x = 68,117.17

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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.