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Finding the Fourth Proportional to 71,528.40, 98,703.72 and 41,299.92

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Solution

The fourth proportional to 71,528.40, 98,703.72 and 41,299.92 is: 56,990.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,528.40 : 98,703.72 = 41,299.92 : x
  2. Step 2: Convert to fraction form
    71,528.40/98,703.72 = 41,299.92/x
  3. Step 3: Cross multiply
    71,528.40x = 98,703.72 × 41,299.92
  4. Step 4: Simplify right side
    71,528.40x = 4,076,455,739.70
  5. Step 5: Solve for x
    x = 4,076,455,739.70/71,528.40
  6. Step 6: Final answer
    x = 56,990.73

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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.