Home / 138,147.18-190,643.40-81,562.20

Finding the Fourth Proportional to 138,147.18, 190,643.40 and 81,562.20

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Solution

The fourth proportional to 138,147.18, 190,643.40 and 81,562.20 is: 112,556.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,147.18 : 190,643.40 = 81,562.20 : x
  2. Step 2: Convert to fraction form
    138,147.18/190,643.40 = 81,562.20/x
  3. Step 3: Cross multiply
    138,147.18x = 190,643.40 × 81,562.20
  4. Step 4: Simplify right side
    138,147.18x = 15,549,295,119.48
  5. Step 5: Solve for x
    x = 15,549,295,119.48/138,147.18
  6. Step 6: Final answer
    x = 112,556.01

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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.