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Finding the Fourth Proportional to 61,389.90, 92,112.80 and 29,782.89

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Solution

The fourth proportional to 61,389.90, 92,112.80 and 29,782.89 is: 44,687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,389.90 : 92,112.80 = 29,782.89 : x
  2. Step 2: Convert to fraction form
    61,389.90/92,112.80 = 29,782.89/x
  3. Step 3: Cross multiply
    61,389.90x = 92,112.80 × 29,782.89
  4. Step 4: Simplify right side
    61,389.90x = 2,743,385,241.08
  5. Step 5: Solve for x
    x = 2,743,385,241.08/61,389.90
  6. Step 6: Final answer
    x = 44,687.89

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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.