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Finding the Fourth Proportional to 109,313.55, 163,970.34 and 84,389.97

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Solution

The fourth proportional to 109,313.55, 163,970.34 and 84,389.97 is: 126,584.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,313.55 : 163,970.34 = 84,389.97 : x
  2. Step 2: Convert to fraction form
    109,313.55/163,970.34 = 84,389.97/x
  3. Step 3: Cross multiply
    109,313.55x = 163,970.34 × 84,389.97
  4. Step 4: Simplify right side
    109,313.55x = 13,837,452,073.49
  5. Step 5: Solve for x
    x = 13,837,452,073.49/109,313.55
  6. Step 6: Final answer
    x = 126,584.97

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Similar ratio
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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.