Home / 138,208.30-190,725.15-77,778.93

Finding the Fourth Proportional to 138,208.30, 190,725.15 and 77,778.93

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Solution

The fourth proportional to 138,208.30, 190,725.15 and 77,778.93 is: 107,333.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,208.30 : 190,725.15 = 77,778.93 : x
  2. Step 2: Convert to fraction form
    138,208.30/190,725.15 = 77,778.93/x
  3. Step 3: Cross multiply
    138,208.30x = 190,725.15 × 77,778.93
  4. Step 4: Simplify right side
    138,208.30x = 14,834,398,091.09
  5. Step 5: Solve for x
    x = 14,834,398,091.09/138,208.30
  6. Step 6: Final answer
    x = 107,333.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.