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Finding the Fourth Proportional to 68,966.51, 103,436.77 and 21,574.50

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Solution

The fourth proportional to 68,966.51, 103,436.77 and 21,574.50 is: 32,357.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,966.51 : 103,436.77 = 21,574.50 : x
  2. Step 2: Convert to fraction form
    68,966.51/103,436.77 = 21,574.50/x
  3. Step 3: Cross multiply
    68,966.51x = 103,436.77 × 21,574.50
  4. Step 4: Simplify right side
    68,966.51x = 2,231,596,594.37
  5. Step 5: Solve for x
    x = 2,231,596,594.37/68,966.51
  6. Step 6: Final answer
    x = 32,357.68

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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.