Home / 219,015.90-302,306.58-128,391.48

Finding the Fourth Proportional to 219,015.90, 302,306.58 and 128,391.48

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Solution

The fourth proportional to 219,015.90, 302,306.58 and 128,391.48 is: 177,218.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,015.90 : 302,306.58 = 128,391.48 : x
  2. Step 2: Convert to fraction form
    219,015.90/302,306.58 = 128,391.48/x
  3. Step 3: Cross multiply
    219,015.90x = 302,306.58 × 128,391.48
  4. Step 4: Simplify right side
    219,015.90x = 38,813,589,219.94
  5. Step 5: Solve for x
    x = 38,813,589,219.94/219,015.90
  6. Step 6: Final answer
    x = 177,218.13

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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.