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Finding the Fourth Proportional to 70,735.88, 106,108.32 and 20,815.04

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Solution

The fourth proportional to 70,735.88, 106,108.32 and 20,815.04 is: 31,223.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,735.88 : 106,108.32 = 20,815.04 : x
  2. Step 2: Convert to fraction form
    70,735.88/106,108.32 = 20,815.04/x
  3. Step 3: Cross multiply
    70,735.88x = 106,108.32 × 20,815.04
  4. Step 4: Simplify right side
    70,735.88x = 2,208,648,925.13
  5. Step 5: Solve for x
    x = 2,208,648,925.13/70,735.88
  6. Step 6: Final answer
    x = 31,223.88

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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.