Home / 138,403.71-190,976.81-77,962.32

Finding the Fourth Proportional to 138,403.71, 190,976.81 and 77,962.32

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Solution

The fourth proportional to 138,403.71, 190,976.81 and 77,962.32 is: 107,576.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,403.71 : 190,976.81 = 77,962.32 : x
  2. Step 2: Convert to fraction form
    138,403.71/190,976.81 = 77,962.32/x
  3. Step 3: Cross multiply
    138,403.71x = 190,976.81 × 77,962.32
  4. Step 4: Simplify right side
    138,403.71x = 14,888,994,783.99
  5. Step 5: Solve for x
    x = 14,888,994,783.99/138,403.71
  6. Step 6: Final answer
    x = 107,576.56

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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.