Home / 127,021.49-190,532.56-42,840.78

Finding the Fourth Proportional to 127,021.49, 190,532.56 and 42,840.78

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Solution

The fourth proportional to 127,021.49, 190,532.56 and 42,840.78 is: 64,261.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,021.49 : 190,532.56 = 42,840.78 : x
  2. Step 2: Convert to fraction form
    127,021.49/190,532.56 = 42,840.78/x
  3. Step 3: Cross multiply
    127,021.49x = 190,532.56 × 42,840.78
  4. Step 4: Simplify right side
    127,021.49x = 8,162,563,485.80
  5. Step 5: Solve for x
    x = 8,162,563,485.80/127,021.49
  6. Step 6: Final answer
    x = 64,261.28

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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.