Home / 405,201,520.52-607,862,816.09-128,861,749.85

Finding the Fourth Proportional to 405,201,520.52, 607,862,816.09 and 128,861,749.85

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Solution

The fourth proportional to 405,201,520.52, 607,862,816.09 and 128,861,749.85 is: 193,311,876.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,201,520.52 : 607,862,816.09 = 128,861,749.85 : x
  2. Step 2: Convert to fraction form
    405,201,520.52/607,862,816.09 = 128,861,749.85/x
  3. Step 3: Cross multiply
    405,201,520.52x = 607,862,816.09 × 128,861,749.85
  4. Step 4: Simplify right side
    405,201,520.52x = 78,330,266,149,435,408
  5. Step 5: Solve for x
    x = 78,330,266,149,435,408/405,201,520.52
  6. Step 6: Final answer
    x = 193,311,876.15

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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.