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Finding the Fourth Proportional to 105,391.80, 145,440.72 and 57,649.56

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Solution

The fourth proportional to 105,391.80, 145,440.72 and 57,649.56 is: 79,556.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,391.80 : 145,440.72 = 57,649.56 : x
  2. Step 2: Convert to fraction form
    105,391.80/145,440.72 = 57,649.56/x
  3. Step 3: Cross multiply
    105,391.80x = 145,440.72 × 57,649.56
  4. Step 4: Simplify right side
    105,391.80x = 8,384,593,514.08
  5. Step 5: Solve for x
    x = 8,384,593,514.08/105,391.80
  6. Step 6: Final answer
    x = 79,556.41

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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.