Home / 138,731.16-208,118.34-45,215.16

Finding the Fourth Proportional to 138,731.16, 208,118.34 and 45,215.16

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Solution

The fourth proportional to 138,731.16, 208,118.34 and 45,215.16 is: 67,829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,731.16 : 208,118.34 = 45,215.16 : x
  2. Step 2: Convert to fraction form
    138,731.16/208,118.34 = 45,215.16/x
  3. Step 3: Cross multiply
    138,731.16x = 208,118.34 × 45,215.16
  4. Step 4: Simplify right side
    138,731.16x = 9,410,104,042.03
  5. Step 5: Solve for x
    x = 9,410,104,042.03/138,731.16
  6. Step 6: Final answer
    x = 67,829.78

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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.