Home / 126,303.36-189,212-78,936.96

Finding the Fourth Proportional to 126,303.36, 189,212 and 78,936.96

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Solution

The fourth proportional to 126,303.36, 189,212 and 78,936.96 is: 118,253.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,303.36 : 189,212 = 78,936.96 : x
  2. Step 2: Convert to fraction form
    126,303.36/189,212 = 78,936.96/x
  3. Step 3: Cross multiply
    126,303.36x = 189,212 × 78,936.96
  4. Step 4: Simplify right side
    126,303.36x = 14,935,820,075.52
  5. Step 5: Solve for x
    x = 14,935,820,075.52/126,303.36
  6. Step 6: Final answer
    x = 118,253.55

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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.