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Finding the Fourth Proportional to 84,912.94, 127,428.21 and 31,653.56

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Solution

The fourth proportional to 84,912.94, 127,428.21 and 31,653.56 is: 47,502.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,912.94 : 127,428.21 = 31,653.56 : x
  2. Step 2: Convert to fraction form
    84,912.94/127,428.21 = 31,653.56/x
  3. Step 3: Cross multiply
    84,912.94x = 127,428.21 × 31,653.56
  4. Step 4: Simplify right side
    84,912.94x = 4,033,556,809.50
  5. Step 5: Solve for x
    x = 4,033,556,809.50/84,912.94
  6. Step 6: Final answer
    x = 47,502.26

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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.