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Finding the Fourth Proportional to 150,749.80, 208,071.78 and 87,125.80

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Solution

The fourth proportional to 150,749.80, 208,071.78 and 87,125.80 is: 120,255.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,749.80 : 208,071.78 = 87,125.80 : x
  2. Step 2: Convert to fraction form
    150,749.80/208,071.78 = 87,125.80/x
  3. Step 3: Cross multiply
    150,749.80x = 208,071.78 × 87,125.80
  4. Step 4: Simplify right side
    150,749.80x = 18,128,420,289.92
  5. Step 5: Solve for x
    x = 18,128,420,289.92/150,749.80
  6. Step 6: Final answer
    x = 120,255.02

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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.