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Finding the Fourth Proportional to 72,242.85, 99,698.94 and 40,410.93

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Solution

The fourth proportional to 72,242.85, 99,698.94 and 40,410.93 is: 55,769.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,242.85 : 99,698.94 = 40,410.93 : x
  2. Step 2: Convert to fraction form
    72,242.85/99,698.94 = 40,410.93/x
  3. Step 3: Cross multiply
    72,242.85x = 99,698.94 × 40,410.93
  4. Step 4: Simplify right side
    72,242.85x = 4,028,926,885.41
  5. Step 5: Solve for x
    x = 4,028,926,885.41/72,242.85
  6. Step 6: Final answer
    x = 55,769.21

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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.