Home / 210,081.45-289,934.87-128,457.55

Finding the Fourth Proportional to 210,081.45, 289,934.87 and 128,457.55

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Solution

The fourth proportional to 210,081.45, 289,934.87 and 128,457.55 is: 177,285.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,081.45 : 289,934.87 = 128,457.55 : x
  2. Step 2: Convert to fraction form
    210,081.45/289,934.87 = 128,457.55/x
  3. Step 3: Cross multiply
    210,081.45x = 289,934.87 × 128,457.55
  4. Step 4: Simplify right side
    210,081.45x = 37,244,321,149.02
  5. Step 5: Solve for x
    x = 37,244,321,149.02/210,081.45
  6. Step 6: Final answer
    x = 177,285.15

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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.