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Finding the Fourth Proportional to 70,121.49, 96,776.19 and 39,914.16

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Solution

The fourth proportional to 70,121.49, 96,776.19 and 39,914.16 is: 55,086.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,121.49 : 96,776.19 = 39,914.16 : x
  2. Step 2: Convert to fraction form
    70,121.49/96,776.19 = 39,914.16/x
  3. Step 3: Cross multiply
    70,121.49x = 96,776.19 × 39,914.16
  4. Step 4: Simplify right side
    70,121.49x = 3,862,740,331.85
  5. Step 5: Solve for x
    x = 3,862,740,331.85/70,121.49
  6. Step 6: Final answer
    x = 55,086.40

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1.5x scale

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.