Home / 118,831-163,986.78-71,086.36

Finding the Fourth Proportional to 118,831, 163,986.78 and 71,086.36

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Solution

The fourth proportional to 118,831, 163,986.78 and 71,086.36 is: 98,099.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,831 : 163,986.78 = 71,086.36 : x
  2. Step 2: Convert to fraction form
    118,831/163,986.78 = 71,086.36/x
  3. Step 3: Cross multiply
    118,831x = 163,986.78 × 71,086.36
  4. Step 4: Simplify right side
    118,831x = 11,657,223,278.32
  5. Step 5: Solve for x
    x = 11,657,223,278.32/118,831
  6. Step 6: Final answer
    x = 98,099.18

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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.