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Finding the Fourth Proportional to 70,898.62, 106,347.60 and 20,979.02

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Solution

The fourth proportional to 70,898.62, 106,347.60 and 20,979.02 is: 31,468.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,898.62 : 106,347.60 = 20,979.02 : x
  2. Step 2: Convert to fraction form
    70,898.62/106,347.60 = 20,979.02/x
  3. Step 3: Cross multiply
    70,898.62x = 106,347.60 × 20,979.02
  4. Step 4: Simplify right side
    70,898.62x = 2,231,068,427.35
  5. Step 5: Solve for x
    x = 2,231,068,427.35/70,898.62
  6. Step 6: Final answer
    x = 31,468.43

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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.