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Finding the Fourth Proportional to 74,803, 103,230.12 and 40,812.04

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Solution

The fourth proportional to 74,803, 103,230.12 and 40,812.04 is: 56,321.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,803 : 103,230.12 = 40,812.04 : x
  2. Step 2: Convert to fraction form
    74,803/103,230.12 = 40,812.04/x
  3. Step 3: Cross multiply
    74,803x = 103,230.12 × 40,812.04
  4. Step 4: Simplify right side
    74,803x = 4,213,031,786.64
  5. Step 5: Solve for x
    x = 4,213,031,786.64/74,803
  6. Step 6: Final answer
    x = 56,321.70

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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.