Home / 81,936.42-122,905.02-28,628.17

Finding the Fourth Proportional to 81,936.42, 122,905.02 and 28,628.17

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Solution

The fourth proportional to 81,936.42, 122,905.02 and 28,628.17 is: 42,942.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,936.42 : 122,905.02 = 28,628.17 : x
  2. Step 2: Convert to fraction form
    81,936.42/122,905.02 = 28,628.17/x
  3. Step 3: Cross multiply
    81,936.42x = 122,905.02 × 28,628.17
  4. Step 4: Simplify right side
    81,936.42x = 3,518,545,806.41
  5. Step 5: Solve for x
    x = 3,518,545,806.41/81,936.42
  6. Step 6: Final answer
    x = 42,942.39

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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.