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Finding the Fourth Proportional to 70,574.93, 105,781.86 and 28,428.04

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Solution

The fourth proportional to 70,574.93, 105,781.86 and 28,428.04 is: 42,609.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,574.93 : 105,781.86 = 28,428.04 : x
  2. Step 2: Convert to fraction form
    70,574.93/105,781.86 = 28,428.04/x
  3. Step 3: Cross multiply
    70,574.93x = 105,781.86 × 28,428.04
  4. Step 4: Simplify right side
    70,574.93x = 3,007,170,682.90
  5. Step 5: Solve for x
    x = 3,007,170,682.90/70,574.93
  6. Step 6: Final answer
    x = 42,609.62

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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.