Home / 138,392.08-190,971.40-81,792.56

Finding the Fourth Proportional to 138,392.08, 190,971.40 and 81,792.56

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Solution

The fourth proportional to 138,392.08, 190,971.40 and 81,792.56 is: 112,868.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,392.08 : 190,971.40 = 81,792.56 : x
  2. Step 2: Convert to fraction form
    138,392.08/190,971.40 = 81,792.56/x
  3. Step 3: Cross multiply
    138,392.08x = 190,971.40 × 81,792.56
  4. Step 4: Simplify right side
    138,392.08x = 15,620,039,692.78
  5. Step 5: Solve for x
    x = 15,620,039,692.78/138,392.08
  6. Step 6: Final answer
    x = 112,868.02

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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.