Home / 80,557,278.40-120,835,917.60-72,495,121.60

Finding the Fourth Proportional to 80,557,278.40, 120,835,917.60 and 72,495,121.60

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Solution

The fourth proportional to 80,557,278.40, 120,835,917.60 and 72,495,121.60 is: 108,742,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,557,278.40 : 120,835,917.60 = 72,495,121.60 : x
  2. Step 2: Convert to fraction form
    80,557,278.40/120,835,917.60 = 72,495,121.60/x
  3. Step 3: Cross multiply
    80,557,278.40x = 120,835,917.60 × 72,495,121.60
  4. Step 4: Simplify right side
    80,557,278.40x = 8,760,014,540,059,579
  5. Step 5: Solve for x
    x = 8,760,014,540,059,579/80,557,278.40
  6. Step 6: Final answer
    x = 108,742,682.40

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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.