Home / 138,025.12-190,450.90-77,587.36

Finding the Fourth Proportional to 138,025.12, 190,450.90 and 77,587.36

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Solution

The fourth proportional to 138,025.12, 190,450.90 and 77,587.36 is: 107,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,025.12 : 190,450.90 = 77,587.36 : x
  2. Step 2: Convert to fraction form
    138,025.12/190,450.90 = 77,587.36/x
  3. Step 3: Cross multiply
    138,025.12x = 190,450.90 × 77,587.36
  4. Step 4: Simplify right side
    138,025.12x = 14,776,582,540.62
  5. Step 5: Solve for x
    x = 14,776,582,540.62/138,025.12
  6. Step 6: Final answer
    x = 107,057.20

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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.