Home / 126,921.40-190,151.70-103,420.60

Finding the Fourth Proportional to 126,921.40, 190,151.70 and 103,420.60

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Solution

The fourth proportional to 126,921.40, 190,151.70 and 103,420.60 is: 154,943.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,921.40 : 190,151.70 = 103,420.60 : x
  2. Step 2: Convert to fraction form
    126,921.40/190,151.70 = 103,420.60/x
  3. Step 3: Cross multiply
    126,921.40x = 190,151.70 × 103,420.60
  4. Step 4: Simplify right side
    126,921.40x = 19,665,602,905.02
  5. Step 5: Solve for x
    x = 19,665,602,905.02/126,921.40
  6. Step 6: Final answer
    x = 154,943.16

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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.