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Finding the Fourth Proportional to 54,985.86, 82,480.50 and 43,128.54

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Solution

The fourth proportional to 54,985.86, 82,480.50 and 43,128.54 is: 64,694.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,985.86 : 82,480.50 = 43,128.54 : x
  2. Step 2: Convert to fraction form
    54,985.86/82,480.50 = 43,128.54/x
  3. Step 3: Cross multiply
    54,985.86x = 82,480.50 × 43,128.54
  4. Step 4: Simplify right side
    54,985.86x = 3,557,263,543.47
  5. Step 5: Solve for x
    x = 3,557,263,543.47/54,985.86
  6. Step 6: Final answer
    x = 64,694.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.