Home / 428,584,346.48-642,807,643.80-117,619,307.12

Finding the Fourth Proportional to 428,584,346.48, 642,807,643.80 and 117,619,307.12

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Solution

The fourth proportional to 428,584,346.48, 642,807,643.80 and 117,619,307.12 is: 176,410,058.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,584,346.48 : 642,807,643.80 = 117,619,307.12 : x
  2. Step 2: Convert to fraction form
    428,584,346.48/642,807,643.80 = 117,619,307.12/x
  3. Step 3: Cross multiply
    428,584,346.48x = 642,807,643.80 × 117,619,307.12
  4. Step 4: Simplify right side
    428,584,346.48x = 75,606,589,675,195,760
  5. Step 5: Solve for x
    x = 75,606,589,675,195,760/428,584,346.48
  6. Step 6: Final answer
    x = 176,410,058.59

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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.