Home / 211,939.92-317,129.04-127,749.60

Finding the Fourth Proportional to 211,939.92, 317,129.04 and 127,749.60

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Solution

The fourth proportional to 211,939.92, 317,129.04 and 127,749.60 is: 191,153.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,939.92 : 317,129.04 = 127,749.60 : x
  2. Step 2: Convert to fraction form
    211,939.92/317,129.04 = 127,749.60/x
  3. Step 3: Cross multiply
    211,939.92x = 317,129.04 × 127,749.60
  4. Step 4: Simplify right side
    211,939.92x = 40,513,108,008.38
  5. Step 5: Solve for x
    x = 40,513,108,008.38/211,939.92
  6. Step 6: Final answer
    x = 191,153.74

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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.