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Finding the Fourth Proportional to 105,344.88, 145,473.48 and 67,685.28

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Solution

The fourth proportional to 105,344.88, 145,473.48 and 67,685.28 is: 93,468.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,344.88 : 145,473.48 = 67,685.28 : x
  2. Step 2: Convert to fraction form
    105,344.88/145,473.48 = 67,685.28/x
  3. Step 3: Cross multiply
    105,344.88x = 145,473.48 × 67,685.28
  4. Step 4: Simplify right side
    105,344.88x = 9,846,413,226.37
  5. Step 5: Solve for x
    x = 9,846,413,226.37/105,344.88
  6. Step 6: Final answer
    x = 93,468.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.