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Finding the Fourth Proportional to 66,124.73, 91,260.47 and 40,978.01

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Solution

The fourth proportional to 66,124.73, 91,260.47 and 40,978.01 is: 56,554.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,124.73 : 91,260.47 = 40,978.01 : x
  2. Step 2: Convert to fraction form
    66,124.73/91,260.47 = 40,978.01/x
  3. Step 3: Cross multiply
    66,124.73x = 91,260.47 × 40,978.01
  4. Step 4: Simplify right side
    66,124.73x = 3,739,672,452.26
  5. Step 5: Solve for x
    x = 3,739,672,452.26/66,124.73
  6. Step 6: Final answer
    x = 56,554.82

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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.