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Finding the Fourth Proportional to 128,171.40, 192,290.70 and 49,288.20

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Solution

The fourth proportional to 128,171.40, 192,290.70 and 49,288.20 is: 73,945.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,171.40 : 192,290.70 = 49,288.20 : x
  2. Step 2: Convert to fraction form
    128,171.40/192,290.70 = 49,288.20/x
  3. Step 3: Cross multiply
    128,171.40x = 192,290.70 × 49,288.20
  4. Step 4: Simplify right side
    128,171.40x = 9,477,662,479.74
  5. Step 5: Solve for x
    x = 9,477,662,479.74/128,171.40
  6. Step 6: Final answer
    x = 73,945.22

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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.