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Finding the Fourth Proportional to 70,820.68, 106,268.04 and 28,705.24

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Solution

The fourth proportional to 70,820.68, 106,268.04 and 28,705.24 is: 43,072.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,820.68 : 106,268.04 = 28,705.24 : x
  2. Step 2: Convert to fraction form
    70,820.68/106,268.04 = 28,705.24/x
  3. Step 3: Cross multiply
    70,820.68x = 106,268.04 × 28,705.24
  4. Step 4: Simplify right side
    70,820.68x = 3,050,449,592.53
  5. Step 5: Solve for x
    x = 3,050,449,592.53/70,820.68
  6. Step 6: Final answer
    x = 43,072.87

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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.