Home / 138,330.36-190,906.08-77,907.60

Finding the Fourth Proportional to 138,330.36, 190,906.08 and 77,907.60

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Solution

The fourth proportional to 138,330.36, 190,906.08 and 77,907.60 is: 107,518.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,330.36 : 190,906.08 = 77,907.60 : x
  2. Step 2: Convert to fraction form
    138,330.36/190,906.08 = 77,907.60/x
  3. Step 3: Cross multiply
    138,330.36x = 190,906.08 × 77,907.60
  4. Step 4: Simplify right side
    138,330.36x = 14,873,034,518.21
  5. Step 5: Solve for x
    x = 14,873,034,518.21/138,330.36
  6. Step 6: Final answer
    x = 107,518.22

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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.