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Finding the Fourth Proportional to 72,275.85, 108,410.42 and 18,966.51

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Solution

The fourth proportional to 72,275.85, 108,410.42 and 18,966.51 is: 28,448.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,275.85 : 108,410.42 = 18,966.51 : x
  2. Step 2: Convert to fraction form
    72,275.85/108,410.42 = 18,966.51/x
  3. Step 3: Cross multiply
    72,275.85x = 108,410.42 × 18,966.51
  4. Step 4: Simplify right side
    72,275.85x = 2,056,167,315.03
  5. Step 5: Solve for x
    x = 2,056,167,315.03/72,275.85
  6. Step 6: Final answer
    x = 28,448.88

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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.