Home / 138,889.06-208,320.63-68,814.34

Finding the Fourth Proportional to 138,889.06, 208,320.63 and 68,814.34

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Solution

The fourth proportional to 138,889.06, 208,320.63 and 68,814.34 is: 103,215.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,889.06 : 208,320.63 = 68,814.34 : x
  2. Step 2: Convert to fraction form
    138,889.06/208,320.63 = 68,814.34/x
  3. Step 3: Cross multiply
    138,889.06x = 208,320.63 × 68,814.34
  4. Step 4: Simplify right side
    138,889.06x = 14,335,446,661.83
  5. Step 5: Solve for x
    x = 14,335,446,661.83/138,889.06
  6. Step 6: Final answer
    x = 103,215.09

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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.