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Finding the Fourth Proportional to 92,939.64, 128,191.02 and 57,149.88

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Solution

The fourth proportional to 92,939.64, 128,191.02 and 57,149.88 is: 78,826.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,939.64 : 128,191.02 = 57,149.88 : x
  2. Step 2: Convert to fraction form
    92,939.64/128,191.02 = 57,149.88/x
  3. Step 3: Cross multiply
    92,939.64x = 128,191.02 × 57,149.88
  4. Step 4: Simplify right side
    92,939.64x = 7,326,101,410.08
  5. Step 5: Solve for x
    x = 7,326,101,410.08/92,939.64
  6. Step 6: Final answer
    x = 78,826.44

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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.