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Finding the Fourth Proportional to 318,607.97, 477,913.30 and 129,072.02

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Solution

The fourth proportional to 318,607.97, 477,913.30 and 129,072.02 is: 193,608.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,607.97 : 477,913.30 = 129,072.02 : x
  2. Step 2: Convert to fraction form
    318,607.97/477,913.30 = 129,072.02/x
  3. Step 3: Cross multiply
    318,607.97x = 477,913.30 × 129,072.02
  4. Step 4: Simplify right side
    318,607.97x = 61,685,232,303.62
  5. Step 5: Solve for x
    x = 61,685,232,303.62/318,607.97
  6. Step 6: Final answer
    x = 193,608.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.