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Finding the Fourth Proportional to 61,419.30, 91,964.88 and 39,111.90

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Solution

The fourth proportional to 61,419.30, 91,964.88 and 39,111.90 is: 58,563.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,419.30 : 91,964.88 = 39,111.90 : x
  2. Step 2: Convert to fraction form
    61,419.30/91,964.88 = 39,111.90/x
  3. Step 3: Cross multiply
    61,419.30x = 91,964.88 × 39,111.90
  4. Step 4: Simplify right side
    61,419.30x = 3,596,921,190.07
  5. Step 5: Solve for x
    x = 3,596,921,190.07/61,419.30
  6. Step 6: Final answer
    x = 58,563.37

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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.