Home / 81,643.20-122,464.80-46,586.40

Finding the Fourth Proportional to 81,643.20, 122,464.80 and 46,586.40

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Solution

The fourth proportional to 81,643.20, 122,464.80 and 46,586.40 is: 69,879.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,643.20 : 122,464.80 = 46,586.40 : x
  2. Step 2: Convert to fraction form
    81,643.20/122,464.80 = 46,586.40/x
  3. Step 3: Cross multiply
    81,643.20x = 122,464.80 × 46,586.40
  4. Step 4: Simplify right side
    81,643.20x = 5,705,194,158.72
  5. Step 5: Solve for x
    x = 5,705,194,158.72/81,643.20
  6. Step 6: Final answer
    x = 69,879.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.