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Finding the Fourth Proportional to 70,572.52, 105,861.66 and 17,983.72

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Solution

The fourth proportional to 70,572.52, 105,861.66 and 17,983.72 is: 26,976.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,572.52 : 105,861.66 = 17,983.72 : x
  2. Step 2: Convert to fraction form
    70,572.52/105,861.66 = 17,983.72/x
  3. Step 3: Cross multiply
    70,572.52x = 105,861.66 × 17,983.72
  4. Step 4: Simplify right side
    70,572.52x = 1,903,786,452.18
  5. Step 5: Solve for x
    x = 1,903,786,452.18/70,572.52
  6. Step 6: Final answer
    x = 26,976.31

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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.