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Finding the Fourth Proportional to 91,628.91, 126,509.49 and 57,225.98

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Solution

The fourth proportional to 91,628.91, 126,509.49 and 57,225.98 is: 79,010.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,628.91 : 126,509.49 = 57,225.98 : x
  2. Step 2: Convert to fraction form
    91,628.91/126,509.49 = 57,225.98/x
  3. Step 3: Cross multiply
    91,628.91x = 126,509.49 × 57,225.98
  4. Step 4: Simplify right side
    91,628.91x = 7,239,628,912.00
  5. Step 5: Solve for x
    x = 7,239,628,912.00/91,628.91
  6. Step 6: Final answer
    x = 79,010.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.