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Finding the Fourth Proportional to 318,408.34, 477,661.70 and 118,757.10

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Solution

The fourth proportional to 318,408.34, 477,661.70 and 118,757.10 is: 178,154.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,408.34 : 477,661.70 = 118,757.10 : x
  2. Step 2: Convert to fraction form
    318,408.34/477,661.70 = 118,757.10/x
  3. Step 3: Cross multiply
    318,408.34x = 477,661.70 × 118,757.10
  4. Step 4: Simplify right side
    318,408.34x = 56,725,718,273.07
  5. Step 5: Solve for x
    x = 56,725,718,273.07/318,408.34
  6. Step 6: Final answer
    x = 178,154.00

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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.