Home / 138,185.12-190,690.80-77,756.96

Finding the Fourth Proportional to 138,185.12, 190,690.80 and 77,756.96

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Solution

The fourth proportional to 138,185.12, 190,690.80 and 77,756.96 is: 107,301.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,185.12 : 190,690.80 = 77,756.96 : x
  2. Step 2: Convert to fraction form
    138,185.12/190,690.80 = 77,756.96/x
  3. Step 3: Cross multiply
    138,185.12x = 190,690.80 × 77,756.96
  4. Step 4: Simplify right side
    138,185.12x = 14,827,536,907.97
  5. Step 5: Solve for x
    x = 14,827,536,907.97/138,185.12
  6. Step 6: Final answer
    x = 107,301.98

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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.