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Finding the Fourth Proportional to 135,066.60, 186,403.13 and 74,649.04

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Solution

The fourth proportional to 135,066.60, 186,403.13 and 74,649.04 is: 103,021.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,066.60 : 186,403.13 = 74,649.04 : x
  2. Step 2: Convert to fraction form
    135,066.60/186,403.13 = 74,649.04/x
  3. Step 3: Cross multiply
    135,066.60x = 186,403.13 × 74,649.04
  4. Step 4: Simplify right side
    135,066.60x = 13,914,813,402.23
  5. Step 5: Solve for x
    x = 13,914,813,402.23/135,066.60
  6. Step 6: Final answer
    x = 103,021.87

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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.