Home / 78,212,485.45-108,022,809.35-51,509,186.70

Finding the Fourth Proportional to 78,212,485.45, 108,022,809.35 and 51,509,186.70

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Solution

The fourth proportional to 78,212,485.45, 108,022,809.35 and 51,509,186.70 is: 71,141,672.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,212,485.45 : 108,022,809.35 = 51,509,186.70 : x
  2. Step 2: Convert to fraction form
    78,212,485.45/108,022,809.35 = 51,509,186.70/x
  3. Step 3: Cross multiply
    78,212,485.45x = 108,022,809.35 × 51,509,186.70
  4. Step 4: Simplify right side
    78,212,485.45x = 5,564,167,054,667,656
  5. Step 5: Solve for x
    x = 5,564,167,054,667,656/78,212,485.45
  6. Step 6: Final answer
    x = 71,141,672.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.