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Finding the Fourth Proportional to 92,835.25, 128,112.53 and 50,393.78

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Solution

The fourth proportional to 92,835.25, 128,112.53 and 50,393.78 is: 69,543.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,835.25 : 128,112.53 = 50,393.78 : x
  2. Step 2: Convert to fraction form
    92,835.25/128,112.53 = 50,393.78/x
  3. Step 3: Cross multiply
    92,835.25x = 128,112.53 × 50,393.78
  4. Step 4: Simplify right side
    92,835.25x = 6,456,074,652.06
  5. Step 5: Solve for x
    x = 6,456,074,652.06/92,835.25
  6. Step 6: Final answer
    x = 69,543.35

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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.