Home / 128,759,273.92-178,155,689.60-112,273,774.72

Finding the Fourth Proportional to 128,759,273.92, 178,155,689.60 and 112,273,774.72

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Solution

The fourth proportional to 128,759,273.92, 178,155,689.60 and 112,273,774.72 is: 155,345,794.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,759,273.92 : 178,155,689.60 = 112,273,774.72 : x
  2. Step 2: Convert to fraction form
    128,759,273.92/178,155,689.60 = 112,273,774.72/x
  3. Step 3: Cross multiply
    128,759,273.92x = 178,155,689.60 × 112,273,774.72
  4. Step 4: Simplify right side
    128,759,273.92x = 20,002,211,759,236,648
  5. Step 5: Solve for x
    x = 20,002,211,759,236,648/128,759,273.92
  6. Step 6: Final answer
    x = 155,345,794.91

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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.