Home / 81,984.70-122,977.05-40,426.30

Finding the Fourth Proportional to 81,984.70, 122,977.05 and 40,426.30

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Solution

The fourth proportional to 81,984.70, 122,977.05 and 40,426.30 is: 60,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,984.70 : 122,977.05 = 40,426.30 : x
  2. Step 2: Convert to fraction form
    81,984.70/122,977.05 = 40,426.30/x
  3. Step 3: Cross multiply
    81,984.70x = 122,977.05 × 40,426.30
  4. Step 4: Simplify right side
    81,984.70x = 4,971,507,116.42
  5. Step 5: Solve for x
    x = 4,971,507,116.42/81,984.70
  6. Step 6: Final answer
    x = 60,639.45

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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.