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Finding the Fourth Proportional to 70,884.89, 106,348.09 and 20,966.31

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Solution

The fourth proportional to 70,884.89, 106,348.09 and 20,966.31 is: 31,455.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,884.89 : 106,348.09 = 20,966.31 : x
  2. Step 2: Convert to fraction form
    70,884.89/106,348.09 = 20,966.31/x
  3. Step 3: Cross multiply
    70,884.89x = 106,348.09 × 20,966.31
  4. Step 4: Simplify right side
    70,884.89x = 2,229,727,009.74
  5. Step 5: Solve for x
    x = 2,229,727,009.74/70,884.89
  6. Step 6: Final answer
    x = 31,455.60

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1.5x scale

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.