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Finding the Fourth Proportional to 318,401.12, 477,602.08 and 118,718.48

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Solution

The fourth proportional to 318,401.12, 477,602.08 and 118,718.48 is: 178,077.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,401.12 : 477,602.08 = 118,718.48 : x
  2. Step 2: Convert to fraction form
    318,401.12/477,602.08 = 118,718.48/x
  3. Step 3: Cross multiply
    318,401.12x = 477,602.08 × 118,718.48
  4. Step 4: Simplify right side
    318,401.12x = 56,700,192,982.44
  5. Step 5: Solve for x
    x = 56,700,192,982.44/318,401.12
  6. Step 6: Final answer
    x = 178,077.87

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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.