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Finding the Fourth Proportional to 126,728.16, 190,111.44 and 91,930.40

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Solution

The fourth proportional to 126,728.16, 190,111.44 and 91,930.40 is: 137,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,728.16 : 190,111.44 = 91,930.40 : x
  2. Step 2: Convert to fraction form
    126,728.16/190,111.44 = 91,930.40/x
  3. Step 3: Cross multiply
    126,728.16x = 190,111.44 × 91,930.40
  4. Step 4: Simplify right side
    126,728.16x = 17,477,020,723.78
  5. Step 5: Solve for x
    x = 17,477,020,723.78/126,728.16
  6. Step 6: Final answer
    x = 137,909.53

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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.