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Finding the Fourth Proportional to 49,999.90, 68,999.91 and 28,783.30

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Solution

The fourth proportional to 49,999.90, 68,999.91 and 28,783.30 is: 39,720.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,999.90 : 68,999.91 = 28,783.30 : x
  2. Step 2: Convert to fraction form
    49,999.90/68,999.91 = 28,783.30/x
  3. Step 3: Cross multiply
    49,999.90x = 68,999.91 × 28,783.30
  4. Step 4: Simplify right side
    49,999.90x = 1,986,045,109.50
  5. Step 5: Solve for x
    x = 1,986,045,109.50/49,999.90
  6. Step 6: Final answer
    x = 39,720.98

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1.5x scale

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.