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Finding the Fourth Proportional to 74,989.68, 103,483.80 and 40,997.16

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Solution

The fourth proportional to 74,989.68, 103,483.80 and 40,997.16 is: 56,575.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,989.68 : 103,483.80 = 40,997.16 : x
  2. Step 2: Convert to fraction form
    74,989.68/103,483.80 = 40,997.16/x
  3. Step 3: Cross multiply
    74,989.68x = 103,483.80 × 40,997.16
  4. Step 4: Simplify right side
    74,989.68x = 4,242,541,906.01
  5. Step 5: Solve for x
    x = 4,242,541,906.01/74,989.68
  6. Step 6: Final answer
    x = 56,575.01

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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.