Home / 78,939.39-108,935.08-43,128.63

Finding the Fourth Proportional to 78,939.39, 108,935.08 and 43,128.63

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Solution

The fourth proportional to 78,939.39, 108,935.08 and 43,128.63 is: 59,516.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.39 : 108,935.08 = 43,128.63 : x
  2. Step 2: Convert to fraction form
    78,939.39/108,935.08 = 43,128.63/x
  3. Step 3: Cross multiply
    78,939.39x = 108,935.08 × 43,128.63
  4. Step 4: Simplify right side
    78,939.39x = 4,698,220,651.52
  5. Step 5: Solve for x
    x = 4,698,220,651.52/78,939.39
  6. Step 6: Final answer
    x = 59,516.81

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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.