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Finding the Fourth Proportional to 70,924.44, 106,402.20 and 21,008.40

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Solution

The fourth proportional to 70,924.44, 106,402.20 and 21,008.40 is: 31,517.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,924.44 : 106,402.20 = 21,008.40 : x
  2. Step 2: Convert to fraction form
    70,924.44/106,402.20 = 21,008.40/x
  3. Step 3: Cross multiply
    70,924.44x = 106,402.20 × 21,008.40
  4. Step 4: Simplify right side
    70,924.44x = 2,235,339,978.48
  5. Step 5: Solve for x
    x = 2,235,339,978.48/70,924.44
  6. Step 6: Final answer
    x = 31,517.20

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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.