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Finding the Fourth Proportional to 66,040.76, 91,029.70 and 54,083

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Solution

The fourth proportional to 66,040.76, 91,029.70 and 54,083 is: 74,547.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,040.76 : 91,029.70 = 54,083 : x
  2. Step 2: Convert to fraction form
    66,040.76/91,029.70 = 54,083/x
  3. Step 3: Cross multiply
    66,040.76x = 91,029.70 × 54,083
  4. Step 4: Simplify right side
    66,040.76x = 4,923,159,265.10
  5. Step 5: Solve for x
    x = 4,923,159,265.10/66,040.76
  6. Step 6: Final answer
    x = 74,547.28

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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.