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Finding the Fourth Proportional to 138,887.70, 208,200.36 and 50,117.40

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Solution

The fourth proportional to 138,887.70, 208,200.36 and 50,117.40 is: 75,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.70 : 208,200.36 = 50,117.40 : x
  2. Step 2: Convert to fraction form
    138,887.70/208,200.36 = 50,117.40/x
  3. Step 3: Cross multiply
    138,887.70x = 208,200.36 × 50,117.40
  4. Step 4: Simplify right side
    138,887.70x = 10,434,460,722.26
  5. Step 5: Solve for x
    x = 10,434,460,722.26/138,887.70
  6. Step 6: Final answer
    x = 75,128.76

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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.