Home / 81,628.20-122,442.30-69,818.40

Finding the Fourth Proportional to 81,628.20, 122,442.30 and 69,818.40

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Solution

The fourth proportional to 81,628.20, 122,442.30 and 69,818.40 is: 104,727.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,628.20 : 122,442.30 = 69,818.40 : x
  2. Step 2: Convert to fraction form
    81,628.20/122,442.30 = 69,818.40/x
  3. Step 3: Cross multiply
    81,628.20x = 122,442.30 × 69,818.40
  4. Step 4: Simplify right side
    81,628.20x = 8,548,725,478.32
  5. Step 5: Solve for x
    x = 8,548,725,478.32/81,628.20
  6. Step 6: Final answer
    x = 104,727.60

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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.