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Finding the Fourth Proportional to 70,256.43, 105,384.11 and 28,674.27

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Solution

The fourth proportional to 70,256.43, 105,384.11 and 28,674.27 is: 43,011.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,256.43 : 105,384.11 = 28,674.27 : x
  2. Step 2: Convert to fraction form
    70,256.43/105,384.11 = 28,674.27/x
  3. Step 3: Cross multiply
    70,256.43x = 105,384.11 × 28,674.27
  4. Step 4: Simplify right side
    70,256.43x = 3,021,812,280.48
  5. Step 5: Solve for x
    x = 3,021,812,280.48/70,256.43
  6. Step 6: Final answer
    x = 43,011.18

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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.