Home / 138,078.90-190,554.36-77,649.24

Finding the Fourth Proportional to 138,078.90, 190,554.36 and 77,649.24

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Solution

The fourth proportional to 138,078.90, 190,554.36 and 77,649.24 is: 107,159.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,078.90 : 190,554.36 = 77,649.24 : x
  2. Step 2: Convert to fraction form
    138,078.90/190,554.36 = 77,649.24/x
  3. Step 3: Cross multiply
    138,078.90x = 190,554.36 × 77,649.24
  4. Step 4: Simplify right side
    138,078.90x = 14,796,401,232.69
  5. Step 5: Solve for x
    x = 14,796,401,232.69/138,078.90
  6. Step 6: Final answer
    x = 107,159.03

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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.