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Finding the Fourth Proportional to 93,209.20, 139,959.60 and 71,047.60

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Solution

The fourth proportional to 93,209.20, 139,959.60 and 71,047.60 is: 106,682.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,209.20 : 139,959.60 = 71,047.60 : x
  2. Step 2: Convert to fraction form
    93,209.20/139,959.60 = 71,047.60/x
  3. Step 3: Cross multiply
    93,209.20x = 139,959.60 × 71,047.60
  4. Step 4: Simplify right side
    93,209.20x = 9,943,793,676.96
  5. Step 5: Solve for x
    x = 9,943,793,676.96/93,209.20
  6. Step 6: Final answer
    x = 106,682.53

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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.