Home / 78,212,485.95-108,022,810.04-51,509,187.20

Finding the Fourth Proportional to 78,212,485.95, 108,022,810.04 and 51,509,187.20

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Solution

The fourth proportional to 78,212,485.95, 108,022,810.04 and 51,509,187.20 is: 71,141,673.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,212,485.95 : 108,022,810.04 = 51,509,187.20 : x
  2. Step 2: Convert to fraction form
    78,212,485.95/108,022,810.04 = 51,509,187.20/x
  3. Step 3: Cross multiply
    78,212,485.95x = 108,022,810.04 × 51,509,187.20
  4. Step 4: Simplify right side
    78,212,485.95x = 5,564,167,143,422,739
  5. Step 5: Solve for x
    x = 5,564,167,143,422,739/78,212,485.95
  6. Step 6: Final answer
    x = 71,141,673.56

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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.