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Finding the Fourth Proportional to 91,289.78, 125,979.04 and 51,010.48

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Solution

The fourth proportional to 91,289.78, 125,979.04 and 51,010.48 is: 70,393.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,289.78 : 125,979.04 = 51,010.48 : x
  2. Step 2: Convert to fraction form
    91,289.78/125,979.04 = 51,010.48/x
  3. Step 3: Cross multiply
    91,289.78x = 125,979.04 × 51,010.48
  4. Step 4: Simplify right side
    91,289.78x = 6,426,250,415.39
  5. Step 5: Solve for x
    x = 6,426,250,415.39/91,289.78
  6. Step 6: Final answer
    x = 70,393.98

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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.