Home / 428,110,374.28-642,165,328.12-121,405,027.72

Finding the Fourth Proportional to 428,110,374.28, 642,165,328.12 and 121,405,027.72

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Solution

The fourth proportional to 428,110,374.28, 642,165,328.12 and 121,405,027.72 is: 182,107,475.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,110,374.28 : 642,165,328.12 = 121,405,027.72 : x
  2. Step 2: Convert to fraction form
    428,110,374.28/642,165,328.12 = 121,405,027.72/x
  3. Step 3: Cross multiply
    428,110,374.28x = 642,165,328.12 × 121,405,027.72
  4. Step 4: Simplify right side
    428,110,374.28x = 77,962,099,461,231,488
  5. Step 5: Solve for x
    x = 77,962,099,461,231,488/428,110,374.28
  6. Step 6: Final answer
    x = 182,107,475.42

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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.