Home / 210,388.07-290,339.28-128,729.94

Finding the Fourth Proportional to 210,388.07, 290,339.28 and 128,729.94

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Solution

The fourth proportional to 210,388.07, 290,339.28 and 128,729.94 is: 177,649.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,388.07 : 290,339.28 = 128,729.94 : x
  2. Step 2: Convert to fraction form
    210,388.07/290,339.28 = 128,729.94/x
  3. Step 3: Cross multiply
    210,388.07x = 290,339.28 × 128,729.94
  4. Step 4: Simplify right side
    210,388.07x = 37,375,358,094.04
  5. Step 5: Solve for x
    x = 37,375,358,094.04/210,388.07
  6. Step 6: Final answer
    x = 177,649.61

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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.