Home / 138,040.84-190,498.32-77,608.12

Finding the Fourth Proportional to 138,040.84, 190,498.32 and 77,608.12

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Solution

The fourth proportional to 138,040.84, 190,498.32 and 77,608.12 is: 107,100.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,040.84 : 190,498.32 = 77,608.12 : x
  2. Step 2: Convert to fraction form
    138,040.84/190,498.32 = 77,608.12/x
  3. Step 3: Cross multiply
    138,040.84x = 190,498.32 × 77,608.12
  4. Step 4: Simplify right side
    138,040.84x = 14,784,216,478.36
  5. Step 5: Solve for x
    x = 14,784,216,478.36/138,040.84
  6. Step 6: Final answer
    x = 107,100.31

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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.