Home / 142,757.20-213,905.40-90,072.40

Finding the Fourth Proportional to 142,757.20, 213,905.40 and 90,072.40

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Solution

The fourth proportional to 142,757.20, 213,905.40 and 90,072.40 is: 134,963.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,757.20 : 213,905.40 = 90,072.40 : x
  2. Step 2: Convert to fraction form
    142,757.20/213,905.40 = 90,072.40/x
  3. Step 3: Cross multiply
    142,757.20x = 213,905.40 × 90,072.40
  4. Step 4: Simplify right side
    142,757.20x = 19,266,972,750.96
  5. Step 5: Solve for x
    x = 19,266,972,750.96/142,757.20
  6. Step 6: Final answer
    x = 134,963.23

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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.