Home / 138,222.94-190,765.98-77,805.31

Finding the Fourth Proportional to 138,222.94, 190,765.98 and 77,805.31

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Solution

The fourth proportional to 138,222.94, 190,765.98 and 77,805.31 is: 107,381.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,222.94 : 190,765.98 = 77,805.31 : x
  2. Step 2: Convert to fraction form
    138,222.94/190,765.98 = 77,805.31/x
  3. Step 3: Cross multiply
    138,222.94x = 190,765.98 × 77,805.31
  4. Step 4: Simplify right side
    138,222.94x = 14,842,606,211.35
  5. Step 5: Solve for x
    x = 14,842,606,211.35/138,222.94
  6. Step 6: Final answer
    x = 107,381.64

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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.