Home / 127,999.20-191,998.80-75,381.60

Finding the Fourth Proportional to 127,999.20, 191,998.80 and 75,381.60

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Solution

The fourth proportional to 127,999.20, 191,998.80 and 75,381.60 is: 113,072.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,999.20 : 191,998.80 = 75,381.60 : x
  2. Step 2: Convert to fraction form
    127,999.20/191,998.80 = 75,381.60/x
  3. Step 3: Cross multiply
    127,999.20x = 191,998.80 × 75,381.60
  4. Step 4: Simplify right side
    127,999.20x = 14,473,176,742.08
  5. Step 5: Solve for x
    x = 14,473,176,742.08/127,999.20
  6. Step 6: Final answer
    x = 113,072.40

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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.