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Finding the Fourth Proportional to 72,858, 109,214.04 and 28,423.62

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Solution

The fourth proportional to 72,858, 109,214.04 and 28,423.62 is: 42,606.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,858 : 109,214.04 = 28,423.62 : x
  2. Step 2: Convert to fraction form
    72,858/109,214.04 = 28,423.62/x
  3. Step 3: Cross multiply
    72,858x = 109,214.04 × 28,423.62
  4. Step 4: Simplify right side
    72,858x = 3,104,258,371.62
  5. Step 5: Solve for x
    x = 3,104,258,371.62/72,858
  6. Step 6: Final answer
    x = 42,606.97

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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.