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Finding the Fourth Proportional to 133,139.28, 183,724.68 and 79,484.88

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Solution

The fourth proportional to 133,139.28, 183,724.68 and 79,484.88 is: 109,684.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,139.28 : 183,724.68 = 79,484.88 : x
  2. Step 2: Convert to fraction form
    133,139.28/183,724.68 = 79,484.88/x
  3. Step 3: Cross multiply
    133,139.28x = 183,724.68 × 79,484.88
  4. Step 4: Simplify right side
    133,139.28x = 14,603,334,142.84
  5. Step 5: Solve for x
    x = 14,603,334,142.84/133,139.28
  6. Step 6: Final answer
    x = 109,684.64

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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.