Home / 105,530.45-145,632.26-57,132.89

Finding the Fourth Proportional to 105,530.45, 145,632.26 and 57,132.89

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Solution

The fourth proportional to 105,530.45, 145,632.26 and 57,132.89 is: 78,843.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,530.45 : 145,632.26 = 57,132.89 : x
  2. Step 2: Convert to fraction form
    105,530.45/145,632.26 = 57,132.89/x
  3. Step 3: Cross multiply
    105,530.45x = 145,632.26 × 57,132.89
  4. Step 4: Simplify right side
    105,530.45x = 8,320,391,162.36
  5. Step 5: Solve for x
    x = 8,320,391,162.36/105,530.45
  6. Step 6: Final answer
    x = 78,843.51

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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.