Home / 81,126.77-121,608.07-38,945.21

Finding the Fourth Proportional to 81,126.77, 121,608.07 and 38,945.21

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Solution

The fourth proportional to 81,126.77, 121,608.07 and 38,945.21 is: 58,378.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,126.77 : 121,608.07 = 38,945.21 : x
  2. Step 2: Convert to fraction form
    81,126.77/121,608.07 = 38,945.21/x
  3. Step 3: Cross multiply
    81,126.77x = 121,608.07 × 38,945.21
  4. Step 4: Simplify right side
    81,126.77x = 4,736,051,118.44
  5. Step 5: Solve for x
    x = 4,736,051,118.44/81,126.77
  6. Step 6: Final answer
    x = 58,378.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.