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Finding the Fourth Proportional to 92,900.74, 128,181.05 and 54,661.96

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Solution

The fourth proportional to 92,900.74, 128,181.05 and 54,661.96 is: 75,420.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,900.74 : 128,181.05 = 54,661.96 : x
  2. Step 2: Convert to fraction form
    92,900.74/128,181.05 = 54,661.96/x
  3. Step 3: Cross multiply
    92,900.74x = 128,181.05 × 54,661.96
  4. Step 4: Simplify right side
    92,900.74x = 7,006,626,786.95
  5. Step 5: Solve for x
    x = 7,006,626,786.95/92,900.74
  6. Step 6: Final answer
    x = 75,420.57

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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.