Home / 105,415.43-145,472.09-57,668.22

Finding the Fourth Proportional to 105,415.43, 145,472.09 and 57,668.22

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Solution

The fourth proportional to 105,415.43, 145,472.09 and 57,668.22 is: 79,581.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,415.43 : 145,472.09 = 57,668.22 : x
  2. Step 2: Convert to fraction form
    105,415.43/145,472.09 = 57,668.22/x
  3. Step 3: Cross multiply
    105,415.43x = 145,472.09 × 57,668.22
  4. Step 4: Simplify right side
    105,415.43x = 8,389,116,201.64
  5. Step 5: Solve for x
    x = 8,389,116,201.64/105,415.43
  6. Step 6: Final answer
    x = 79,581.49

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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.