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Finding the Fourth Proportional to 70,410.48, 105,629.04 and 28,293.84

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Solution

The fourth proportional to 70,410.48, 105,629.04 and 28,293.84 is: 42,446.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,410.48 : 105,629.04 = 28,293.84 : x
  2. Step 2: Convert to fraction form
    70,410.48/105,629.04 = 28,293.84/x
  3. Step 3: Cross multiply
    70,410.48x = 105,629.04 × 28,293.84
  4. Step 4: Simplify right side
    70,410.48x = 2,988,651,157.11
  5. Step 5: Solve for x
    x = 2,988,651,157.11/70,410.48
  6. Step 6: Final answer
    x = 42,446.11

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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.