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Finding the Fourth Proportional to 79,698.71, 119,555.40 and 20,534.60

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Solution

The fourth proportional to 79,698.71, 119,555.40 and 20,534.60 is: 30,803.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,698.71 : 119,555.40 = 20,534.60 : x
  2. Step 2: Convert to fraction form
    79,698.71/119,555.40 = 20,534.60/x
  3. Step 3: Cross multiply
    79,698.71x = 119,555.40 × 20,534.60
  4. Step 4: Simplify right side
    79,698.71x = 2,455,022,316.84
  5. Step 5: Solve for x
    x = 2,455,022,316.84/79,698.71
  6. Step 6: Final answer
    x = 30,803.79

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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.