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Finding the Fourth Proportional to 74,980.68, 103,471.59 and 40,989.43

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Solution

The fourth proportional to 74,980.68, 103,471.59 and 40,989.43 is: 56,564.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,980.68 : 103,471.59 = 40,989.43 : x
  2. Step 2: Convert to fraction form
    74,980.68/103,471.59 = 40,989.43/x
  3. Step 3: Cross multiply
    74,980.68x = 103,471.59 × 40,989.43
  4. Step 4: Simplify right side
    74,980.68x = 4,241,241,495.29
  5. Step 5: Solve for x
    x = 4,241,241,495.29/74,980.68
  6. Step 6: Final answer
    x = 56,564.46

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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.