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Finding the Fourth Proportional to 61,124.80, 91,492.80 and 43,628.80

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Solution

The fourth proportional to 61,124.80, 91,492.80 and 43,628.80 is: 65,304.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,124.80 : 91,492.80 = 43,628.80 : x
  2. Step 2: Convert to fraction form
    61,124.80/91,492.80 = 43,628.80/x
  3. Step 3: Cross multiply
    61,124.80x = 91,492.80 × 43,628.80
  4. Step 4: Simplify right side
    61,124.80x = 3,991,721,072.64
  5. Step 5: Solve for x
    x = 3,991,721,072.64/61,124.80
  6. Step 6: Final answer
    x = 65,304.44

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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.