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Finding the Fourth Proportional to 82,991.80, 124,487.70 and 20,662.30

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Solution

The fourth proportional to 82,991.80, 124,487.70 and 20,662.30 is: 30,993.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,991.80 : 124,487.70 = 20,662.30 : x
  2. Step 2: Convert to fraction form
    82,991.80/124,487.70 = 20,662.30/x
  3. Step 3: Cross multiply
    82,991.80x = 124,487.70 × 20,662.30
  4. Step 4: Simplify right side
    82,991.80x = 2,572,202,203.71
  5. Step 5: Solve for x
    x = 2,572,202,203.71/82,991.80
  6. Step 6: Final answer
    x = 30,993.45

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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.