Home / 231,999.48-320,139.74-128,636.44

Finding the Fourth Proportional to 231,999.48, 320,139.74 and 128,636.44

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Solution

The fourth proportional to 231,999.48, 320,139.74 and 128,636.44 is: 177,507.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,999.48 : 320,139.74 = 128,636.44 : x
  2. Step 2: Convert to fraction form
    231,999.48/320,139.74 = 128,636.44/x
  3. Step 3: Cross multiply
    231,999.48x = 320,139.74 × 128,636.44
  4. Step 4: Simplify right side
    231,999.48x = 41,181,636,456.13
  5. Step 5: Solve for x
    x = 41,181,636,456.13/231,999.48
  6. Step 6: Final answer
    x = 177,507.45

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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.