Home / 428,584,345.48-642,807,642.30-117,619,306.12

Finding the Fourth Proportional to 428,584,345.48, 642,807,642.30 and 117,619,306.12

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Solution

The fourth proportional to 428,584,345.48, 642,807,642.30 and 117,619,306.12 is: 176,410,057.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,584,345.48 : 642,807,642.30 = 117,619,306.12 : x
  2. Step 2: Convert to fraction form
    428,584,345.48/642,807,642.30 = 117,619,306.12/x
  3. Step 3: Cross multiply
    428,584,345.48x = 642,807,642.30 × 117,619,306.12
  4. Step 4: Simplify right side
    428,584,345.48x = 75,606,588,855,959,152
  5. Step 5: Solve for x
    x = 75,606,588,855,959,152/428,584,345.48
  6. Step 6: Final answer
    x = 176,410,057.09

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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.