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Finding the Fourth Proportional to 68,689.44, 103,048.95 and 21,303.59

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Solution

The fourth proportional to 68,689.44, 103,048.95 and 21,303.59 is: 31,959.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,689.44 : 103,048.95 = 21,303.59 : x
  2. Step 2: Convert to fraction form
    68,689.44/103,048.95 = 21,303.59/x
  3. Step 3: Cross multiply
    68,689.44x = 103,048.95 × 21,303.59
  4. Step 4: Simplify right side
    68,689.44x = 2,195,312,065.49
  5. Step 5: Solve for x
    x = 2,195,312,065.49/68,689.44
  6. Step 6: Final answer
    x = 31,959.96

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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.