Home / 138,384.18-190,969.32-77,974.28

Finding the Fourth Proportional to 138,384.18, 190,969.32 and 77,974.28

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Solution

The fourth proportional to 138,384.18, 190,969.32 and 77,974.28 is: 107,604.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,384.18 : 190,969.32 = 77,974.28 : x
  2. Step 2: Convert to fraction form
    138,384.18/190,969.32 = 77,974.28/x
  3. Step 3: Cross multiply
    138,384.18x = 190,969.32 × 77,974.28
  4. Step 4: Simplify right side
    138,384.18x = 14,890,695,282.78
  5. Step 5: Solve for x
    x = 14,890,695,282.78/138,384.18
  6. Step 6: Final answer
    x = 107,604.03

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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.