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Finding the Fourth Proportional to 105,486.88, 145,571.94 and 57,740.47

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Solution

The fourth proportional to 105,486.88, 145,571.94 and 57,740.47 is: 79,681.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,486.88 : 145,571.94 = 57,740.47 : x
  2. Step 2: Convert to fraction form
    105,486.88/145,571.94 = 57,740.47/x
  3. Step 3: Cross multiply
    105,486.88x = 145,571.94 × 57,740.47
  4. Step 4: Simplify right side
    105,486.88x = 8,405,392,234.41
  5. Step 5: Solve for x
    x = 8,405,392,234.41/105,486.88
  6. Step 6: Final answer
    x = 79,681.87

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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.