Home / 219,364.73-302,725.32-128,722.20

Finding the Fourth Proportional to 219,364.73, 302,725.32 and 128,722.20

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Solution

The fourth proportional to 219,364.73, 302,725.32 and 128,722.20 is: 177,637.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,364.73 : 302,725.32 = 128,722.20 : x
  2. Step 2: Convert to fraction form
    219,364.73/302,725.32 = 128,722.20/x
  3. Step 3: Cross multiply
    219,364.73x = 302,725.32 × 128,722.20
  4. Step 4: Simplify right side
    219,364.73x = 38,967,469,186.10
  5. Step 5: Solve for x
    x = 38,967,469,186.10/219,364.73
  6. Step 6: Final answer
    x = 177,637.81

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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.