Home / 138,083.40-190,556.20-76,830.48

Finding the Fourth Proportional to 138,083.40, 190,556.20 and 76,830.48

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Solution

The fourth proportional to 138,083.40, 190,556.20 and 76,830.48 is: 106,026.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,083.40 : 190,556.20 = 76,830.48 : x
  2. Step 2: Convert to fraction form
    138,083.40/190,556.20 = 76,830.48/x
  3. Step 3: Cross multiply
    138,083.40x = 190,556.20 × 76,830.48
  4. Step 4: Simplify right side
    138,083.40x = 14,640,524,312.98
  5. Step 5: Solve for x
    x = 14,640,524,312.98/138,083.40
  6. Step 6: Final answer
    x = 106,026.68

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1.5x scale

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.