Home / 428,278,846.52-642,416,979.54-121,571,219

Finding the Fourth Proportional to 428,278,846.52, 642,416,979.54 and 121,571,219

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Solution

The fourth proportional to 428,278,846.52, 642,416,979.54 and 121,571,219 is: 182,356,462.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,278,846.52 : 642,416,979.54 = 121,571,219 : x
  2. Step 2: Convert to fraction form
    428,278,846.52/642,416,979.54 = 121,571,219/x
  3. Step 3: Cross multiply
    428,278,846.52x = 642,416,979.54 × 121,571,219
  4. Step 4: Simplify right side
    428,278,846.52x = 78,099,415,308,975,856
  5. Step 5: Solve for x
    x = 78,099,415,308,975,856/428,278,846.52
  6. Step 6: Final answer
    x = 182,356,462.25

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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.