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Finding the Fourth Proportional to 245,043.20, 367,478.40 and 87,276.80

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Solution

The fourth proportional to 245,043.20, 367,478.40 and 87,276.80 is: 130,884.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,043.20 : 367,478.40 = 87,276.80 : x
  2. Step 2: Convert to fraction form
    245,043.20/367,478.40 = 87,276.80/x
  3. Step 3: Cross multiply
    245,043.20x = 367,478.40 × 87,276.80
  4. Step 4: Simplify right side
    245,043.20x = 32,072,338,821.12
  5. Step 5: Solve for x
    x = 32,072,338,821.12/245,043.20
  6. Step 6: Final answer
    x = 130,884.43

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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.