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Finding the Fourth Proportional to 133,130.82, 183,720.10 and 79,418.10

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Solution

The fourth proportional to 133,130.82, 183,720.10 and 79,418.10 is: 109,596.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,130.82 : 183,720.10 = 79,418.10 : x
  2. Step 2: Convert to fraction form
    133,130.82/183,720.10 = 79,418.10/x
  3. Step 3: Cross multiply
    133,130.82x = 183,720.10 × 79,418.10
  4. Step 4: Simplify right side
    133,130.82x = 14,590,701,913.12
  5. Step 5: Solve for x
    x = 14,590,701,913.12/133,130.82
  6. Step 6: Final answer
    x = 109,596.72

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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.