Home / 80,557,403.40-120,836,105.10-72,495,246.60

Finding the Fourth Proportional to 80,557,403.40, 120,836,105.10 and 72,495,246.60

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Solution

The fourth proportional to 80,557,403.40, 120,836,105.10 and 72,495,246.60 is: 108,742,869.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,557,403.40 : 120,836,105.10 = 72,495,246.60 : x
  2. Step 2: Convert to fraction form
    80,557,403.40/120,836,105.10 = 72,495,246.60/x
  3. Step 3: Cross multiply
    80,557,403.40x = 120,836,105.10 × 72,495,246.60
  4. Step 4: Simplify right side
    80,557,403.40x = 8,760,043,237,408,017
  5. Step 5: Solve for x
    x = 8,760,043,237,408,017/80,557,403.40
  6. Step 6: Final answer
    x = 108,742,869.90

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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.