Home / 105,716.85-145,889.91-57,970.38

Finding the Fourth Proportional to 105,716.85, 145,889.91 and 57,970.38

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Solution

The fourth proportional to 105,716.85, 145,889.91 and 57,970.38 is: 79,999.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,716.85 : 145,889.91 = 57,970.38 : x
  2. Step 2: Convert to fraction form
    105,716.85/145,889.91 = 57,970.38/x
  3. Step 3: Cross multiply
    105,716.85x = 145,889.91 × 57,970.38
  4. Step 4: Simplify right side
    105,716.85x = 8,457,294,067.95
  5. Step 5: Solve for x
    x = 8,457,294,067.95/105,716.85
  6. Step 6: Final answer
    x = 79,999.49

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1.5x scale

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.