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Finding the Fourth Proportional to 70,143.57, 105,215.31 and 17,553.02

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Solution

The fourth proportional to 70,143.57, 105,215.31 and 17,553.02 is: 26,329.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,143.57 : 105,215.31 = 17,553.02 : x
  2. Step 2: Convert to fraction form
    70,143.57/105,215.31 = 17,553.02/x
  3. Step 3: Cross multiply
    70,143.57x = 105,215.31 × 17,553.02
  4. Step 4: Simplify right side
    70,143.57x = 1,846,845,914.66
  5. Step 5: Solve for x
    x = 1,846,845,914.66/70,143.57
  6. Step 6: Final answer
    x = 26,329.51

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1.5x scale

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.