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Finding the Fourth Proportional to 93,213.20, 139,819.80 and 79,216.40

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Solution

The fourth proportional to 93,213.20, 139,819.80 and 79,216.40 is: 118,824.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,213.20 : 139,819.80 = 79,216.40 : x
  2. Step 2: Convert to fraction form
    93,213.20/139,819.80 = 79,216.40/x
  3. Step 3: Cross multiply
    93,213.20x = 139,819.80 × 79,216.40
  4. Step 4: Simplify right side
    93,213.20x = 11,076,021,204.72
  5. Step 5: Solve for x
    x = 11,076,021,204.72/93,213.20
  6. Step 6: Final answer
    x = 118,824.60

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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.