Home / 127,872.07-191,863.40-68,638.55

Finding the Fourth Proportional to 127,872.07, 191,863.40 and 68,638.55

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Solution

The fourth proportional to 127,872.07, 191,863.40 and 68,638.55 is: 102,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,872.07 : 191,863.40 = 68,638.55 : x
  2. Step 2: Convert to fraction form
    127,872.07/191,863.40 = 68,638.55/x
  3. Step 3: Cross multiply
    127,872.07x = 191,863.40 × 68,638.55
  4. Step 4: Simplify right side
    127,872.07x = 13,169,224,271.56
  5. Step 5: Solve for x
    x = 13,169,224,271.56/127,872.07
  6. Step 6: Final answer
    x = 102,987.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.