Home / 78,517,989.73-108,284,288.10-49,151,999.40

Finding the Fourth Proportional to 78,517,989.73, 108,284,288.10 and 49,151,999.40

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Solution

The fourth proportional to 78,517,989.73, 108,284,288.10 and 49,151,999.40 is: 67,785,602.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517,989.73 : 108,284,288.10 = 49,151,999.40 : x
  2. Step 2: Convert to fraction form
    78,517,989.73/108,284,288.10 = 49,151,999.40/x
  3. Step 3: Cross multiply
    78,517,989.73x = 108,284,288.10 × 49,151,999.40
  4. Step 4: Simplify right side
    78,517,989.73x = 5,322,389,263,720,627
  5. Step 5: Solve for x
    x = 5,322,389,263,720,627/78,517,989.73
  6. Step 6: Final answer
    x = 67,785,602.79

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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.