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Finding the Fourth Proportional to 133,086.72, 183,642.24 and 79,378.08

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Solution

The fourth proportional to 133,086.72, 183,642.24 and 79,378.08 is: 109,531.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,086.72 : 183,642.24 = 79,378.08 : x
  2. Step 2: Convert to fraction form
    133,086.72/183,642.24 = 79,378.08/x
  3. Step 3: Cross multiply
    133,086.72x = 183,642.24 × 79,378.08
  4. Step 4: Simplify right side
    133,086.72x = 14,577,168,418.10
  5. Step 5: Solve for x
    x = 14,577,168,418.10/133,086.72
  6. Step 6: Final answer
    x = 109,531.35

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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.