Home / 210,122.79-290,021.76-129,616.35

Finding the Fourth Proportional to 210,122.79, 290,021.76 and 129,616.35

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Solution

The fourth proportional to 210,122.79, 290,021.76 and 129,616.35 is: 178,902.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,122.79 : 290,021.76 = 129,616.35 : x
  2. Step 2: Convert to fraction form
    210,122.79/290,021.76 = 129,616.35/x
  3. Step 3: Cross multiply
    210,122.79x = 290,021.76 × 129,616.35
  4. Step 4: Simplify right side
    210,122.79x = 37,591,561,951.78
  5. Step 5: Solve for x
    x = 37,591,561,951.78/210,122.79
  6. Step 6: Final answer
    x = 178,902.83

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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.