Home / 138,732.75-208,131.93-45,238.50

Finding the Fourth Proportional to 138,732.75, 208,131.93 and 45,238.50

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Solution

The fourth proportional to 138,732.75, 208,131.93 and 45,238.50 is: 67,868.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,732.75 : 208,131.93 = 45,238.50 : x
  2. Step 2: Convert to fraction form
    138,732.75/208,131.93 = 45,238.50/x
  3. Step 3: Cross multiply
    138,732.75x = 208,131.93 × 45,238.50
  4. Step 4: Simplify right side
    138,732.75x = 9,415,576,315.31
  5. Step 5: Solve for x
    x = 9,415,576,315.31/138,732.75
  6. Step 6: Final answer
    x = 67,868.45

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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.