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Finding the Fourth Proportional to 71,884.02, 99,201.60 and 40,054.86

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Solution

The fourth proportional to 71,884.02, 99,201.60 and 40,054.86 is: 55,276.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,884.02 : 99,201.60 = 40,054.86 : x
  2. Step 2: Convert to fraction form
    71,884.02/99,201.60 = 40,054.86/x
  3. Step 3: Cross multiply
    71,884.02x = 99,201.60 × 40,054.86
  4. Step 4: Simplify right side
    71,884.02x = 3,973,506,199.78
  5. Step 5: Solve for x
    x = 3,973,506,199.78/71,884.02
  6. Step 6: Final answer
    x = 55,276.63

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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.