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Finding the Fourth Proportional to 126,647.51, 189,783.26 and 70,410.26

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Solution

The fourth proportional to 126,647.51, 189,783.26 and 70,410.26 is: 105,510.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,647.51 : 189,783.26 = 70,410.26 : x
  2. Step 2: Convert to fraction form
    126,647.51/189,783.26 = 70,410.26/x
  3. Step 3: Cross multiply
    126,647.51x = 189,783.26 × 70,410.26
  4. Step 4: Simplify right side
    126,647.51x = 13,362,687,731.33
  5. Step 5: Solve for x
    x = 13,362,687,731.33/126,647.51
  6. Step 6: Final answer
    x = 105,510.86

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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.