Home / 128,736,851.80-193,105,277.70-80,269,432.60

Finding the Fourth Proportional to 128,736,851.80, 193,105,277.70 and 80,269,432.60

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Solution

The fourth proportional to 128,736,851.80, 193,105,277.70 and 80,269,432.60 is: 120,404,148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736,851.80 : 193,105,277.70 = 80,269,432.60 : x
  2. Step 2: Convert to fraction form
    128,736,851.80/193,105,277.70 = 80,269,432.60/x
  3. Step 3: Cross multiply
    128,736,851.80x = 193,105,277.70 × 80,269,432.60
  4. Step 4: Simplify right side
    128,736,851.80x = 15,500,451,073,044,430
  5. Step 5: Solve for x
    x = 15,500,451,073,044,430/128,736,851.80
  6. Step 6: Final answer
    x = 120,404,148.90

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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.