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Finding the Fourth Proportional to 318,650.76, 478,059.17 and 118,972.80

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Solution

The fourth proportional to 318,650.76, 478,059.17 and 118,972.80 is: 178,490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,650.76 : 478,059.17 = 118,972.80 : x
  2. Step 2: Convert to fraction form
    318,650.76/478,059.17 = 118,972.80/x
  3. Step 3: Cross multiply
    318,650.76x = 478,059.17 × 118,972.80
  4. Step 4: Simplify right side
    318,650.76x = 56,876,037,425.71
  5. Step 5: Solve for x
    x = 56,876,037,425.71/318,650.76
  6. Step 6: Final answer
    x = 178,490.20

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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.