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Finding the Fourth Proportional to 92,858.78, 128,145.16 and 50,418.02

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Solution

The fourth proportional to 92,858.78, 128,145.16 and 50,418.02 is: 69,576.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,858.78 : 128,145.16 = 50,418.02 : x
  2. Step 2: Convert to fraction form
    92,858.78/128,145.16 = 50,418.02/x
  3. Step 3: Cross multiply
    92,858.78x = 128,145.16 × 50,418.02
  4. Step 4: Simplify right side
    92,858.78x = 6,460,825,239.78
  5. Step 5: Solve for x
    x = 6,460,825,239.78/92,858.78
  6. Step 6: Final answer
    x = 69,576.89

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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.