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Finding the Fourth Proportional to 135,656.64, 187,218 and 79,066.80

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Solution

The fourth proportional to 135,656.64, 187,218 and 79,066.80 is: 109,119.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,656.64 : 187,218 = 79,066.80 : x
  2. Step 2: Convert to fraction form
    135,656.64/187,218 = 79,066.80/x
  3. Step 3: Cross multiply
    135,656.64x = 187,218 × 79,066.80
  4. Step 4: Simplify right side
    135,656.64x = 14,802,728,162.40
  5. Step 5: Solve for x
    x = 14,802,728,162.40/135,656.64
  6. Step 6: Final answer
    x = 109,119.08

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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.