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Finding the Fourth Proportional to 81,204.70, 121,807.05 and 39,732.70

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Solution

The fourth proportional to 81,204.70, 121,807.05 and 39,732.70 is: 59,599.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,204.70 : 121,807.05 = 39,732.70 : x
  2. Step 2: Convert to fraction form
    81,204.70/121,807.05 = 39,732.70/x
  3. Step 3: Cross multiply
    81,204.70x = 121,807.05 × 39,732.70
  4. Step 4: Simplify right side
    81,204.70x = 4,839,722,975.54
  5. Step 5: Solve for x
    x = 4,839,722,975.54/81,204.70
  6. Step 6: Final answer
    x = 59,599.05

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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.