Home / 210,370.15-290,321.69-128,672.80

Finding the Fourth Proportional to 210,370.15, 290,321.69 and 128,672.80

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Solution

The fourth proportional to 210,370.15, 290,321.69 and 128,672.80 is: 177,575.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,370.15 : 290,321.69 = 128,672.80 : x
  2. Step 2: Convert to fraction form
    210,370.15/290,321.69 = 128,672.80/x
  3. Step 3: Cross multiply
    210,370.15x = 290,321.69 × 128,672.80
  4. Step 4: Simplify right side
    210,370.15x = 37,356,504,753.03
  5. Step 5: Solve for x
    x = 37,356,504,753.03/210,370.15
  6. Step 6: Final answer
    x = 177,575.12

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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.