Home / 216,993,987.74-299,416,205.85-127,761,128.78

Finding the Fourth Proportional to 216,993,987.74, 299,416,205.85 and 127,761,128.78

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Solution

The fourth proportional to 216,993,987.74, 299,416,205.85 and 127,761,128.78 is: 176,289,457.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,993,987.74 : 299,416,205.85 = 127,761,128.78 : x
  2. Step 2: Convert to fraction form
    216,993,987.74/299,416,205.85 = 127,761,128.78/x
  3. Step 3: Cross multiply
    216,993,987.74x = 299,416,205.85 × 127,761,128.78
  4. Step 4: Simplify right side
    216,993,987.74x = 38,253,752,432,923,760
  5. Step 5: Solve for x
    x = 38,253,752,432,923,760/216,993,987.74
  6. Step 6: Final answer
    x = 176,289,457.75

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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.