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Finding the Fourth Proportional to 47,043.20, 70,564.80 and 20,734.40

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Solution

The fourth proportional to 47,043.20, 70,564.80 and 20,734.40 is: 31,101.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,043.20 : 70,564.80 = 20,734.40 : x
  2. Step 2: Convert to fraction form
    47,043.20/70,564.80 = 20,734.40/x
  3. Step 3: Cross multiply
    47,043.20x = 70,564.80 × 20,734.40
  4. Step 4: Simplify right side
    47,043.20x = 1,463,118,789.12
  5. Step 5: Solve for x
    x = 1,463,118,789.12/47,043.20
  6. Step 6: Final answer
    x = 31,101.60

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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.