Home / 210,212.82-290,090.97-128,513.79

Finding the Fourth Proportional to 210,212.82, 290,090.97 and 128,513.79

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Solution

The fourth proportional to 210,212.82, 290,090.97 and 128,513.79 is: 177,347.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,212.82 : 290,090.97 = 128,513.79 : x
  2. Step 2: Convert to fraction form
    210,212.82/290,090.97 = 128,513.79/x
  3. Step 3: Cross multiply
    210,212.82x = 290,090.97 × 128,513.79
  4. Step 4: Simplify right side
    210,212.82x = 37,280,689,999.48
  5. Step 5: Solve for x
    x = 37,280,689,999.48/210,212.82
  6. Step 6: Final answer
    x = 177,347.37

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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.