Home / 216,511.32-298,765.12-121,015.84

Finding the Fourth Proportional to 216,511.32, 298,765.12 and 121,015.84

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Solution

The fourth proportional to 216,511.32, 298,765.12 and 121,015.84 is: 166,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,511.32 : 298,765.12 = 121,015.84 : x
  2. Step 2: Convert to fraction form
    216,511.32/298,765.12 = 121,015.84/x
  3. Step 3: Cross multiply
    216,511.32x = 298,765.12 × 121,015.84
  4. Step 4: Simplify right side
    216,511.32x = 36,155,311,959.50
  5. Step 5: Solve for x
    x = 36,155,311,959.50/216,511.32
  6. Step 6: Final answer
    x = 166,990.40

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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.