Home / 90,509,675.40-135,764,513.10-54,229,969.80

Finding the Fourth Proportional to 90,509,675.40, 135,764,513.10 and 54,229,969.80

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Solution

The fourth proportional to 90,509,675.40, 135,764,513.10 and 54,229,969.80 is: 81,344,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,509,675.40 : 135,764,513.10 = 54,229,969.80 : x
  2. Step 2: Convert to fraction form
    90,509,675.40/135,764,513.10 = 54,229,969.80/x
  3. Step 3: Cross multiply
    90,509,675.40x = 135,764,513.10 × 54,229,969.80
  4. Step 4: Simplify right side
    90,509,675.40x = 7,362,505,445,324,704
  5. Step 5: Solve for x
    x = 7,362,505,445,324,704/90,509,675.40
  6. Step 6: Final answer
    x = 81,344,954.70

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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.