Home / 90,380,540.40-135,570,810.60-79,043,132.40

Finding the Fourth Proportional to 90,380,540.40, 135,570,810.60 and 79,043,132.40

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Solution

The fourth proportional to 90,380,540.40, 135,570,810.60 and 79,043,132.40 is: 118,564,698.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,380,540.40 : 135,570,810.60 = 79,043,132.40 : x
  2. Step 2: Convert to fraction form
    90,380,540.40/135,570,810.60 = 79,043,132.40/x
  3. Step 3: Cross multiply
    90,380,540.40x = 135,570,810.60 × 79,043,132.40
  4. Step 4: Simplify right side
    90,380,540.40x = 10,715,941,531,831,124
  5. Step 5: Solve for x
    x = 10,715,941,531,831,124/90,380,540.40
  6. Step 6: Final answer
    x = 118,564,698.60

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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.