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Finding the Fourth Proportional to 115,107.84, 171,989.76 and 84,994.56

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Solution

The fourth proportional to 115,107.84, 171,989.76 and 84,994.56 is: 126,995.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,107.84 : 171,989.76 = 84,994.56 : x
  2. Step 2: Convert to fraction form
    115,107.84/171,989.76 = 84,994.56/x
  3. Step 3: Cross multiply
    115,107.84x = 171,989.76 × 84,994.56
  4. Step 4: Simplify right side
    115,107.84x = 14,618,193,975.71
  5. Step 5: Solve for x
    x = 14,618,193,975.71/115,107.84
  6. Step 6: Final answer
    x = 126,995.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.