Home / 209,844.12-289,629.60-138,230.40

Finding the Fourth Proportional to 209,844.12, 289,629.60 and 138,230.40

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Solution

The fourth proportional to 209,844.12, 289,629.60 and 138,230.40 is: 190,787.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,844.12 : 289,629.60 = 138,230.40 : x
  2. Step 2: Convert to fraction form
    209,844.12/289,629.60 = 138,230.40/x
  3. Step 3: Cross multiply
    209,844.12x = 289,629.60 × 138,230.40
  4. Step 4: Simplify right side
    209,844.12x = 40,035,615,459.84
  5. Step 5: Solve for x
    x = 40,035,615,459.84/209,844.12
  6. Step 6: Final answer
    x = 190,787.41

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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.