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Finding the Fourth Proportional to 220,557.80, 330,836.70 and 126,986.60

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Solution

The fourth proportional to 220,557.80, 330,836.70 and 126,986.60 is: 190,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,557.80 : 330,836.70 = 126,986.60 : x
  2. Step 2: Convert to fraction form
    220,557.80/330,836.70 = 126,986.60/x
  3. Step 3: Cross multiply
    220,557.80x = 330,836.70 × 126,986.60
  4. Step 4: Simplify right side
    220,557.80x = 42,011,827,688.22
  5. Step 5: Solve for x
    x = 42,011,827,688.22/220,557.80
  6. Step 6: Final answer
    x = 190,479.90

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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.