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Finding the Fourth Proportional to 72,335.96, 99,821.58 and 40,507.64

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Solution

The fourth proportional to 72,335.96, 99,821.58 and 40,507.64 is: 55,899.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,335.96 : 99,821.58 = 40,507.64 : x
  2. Step 2: Convert to fraction form
    72,335.96/99,821.58 = 40,507.64/x
  3. Step 3: Cross multiply
    72,335.96x = 99,821.58 × 40,507.64
  4. Step 4: Simplify right side
    72,335.96x = 4,043,536,626.87
  5. Step 5: Solve for x
    x = 4,043,536,626.87/72,335.96
  6. Step 6: Final answer
    x = 55,899.40

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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.