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Finding the Fourth Proportional to 73,128.90, 109,709.76 and 23,210.64

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Solution

The fourth proportional to 73,128.90, 109,709.76 and 23,210.64 is: 34,821.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,128.90 : 109,709.76 = 23,210.64 : x
  2. Step 2: Convert to fraction form
    73,128.90/109,709.76 = 23,210.64/x
  3. Step 3: Cross multiply
    73,128.90x = 109,709.76 × 23,210.64
  4. Step 4: Simplify right side
    73,128.90x = 2,546,433,743.85
  5. Step 5: Solve for x
    x = 2,546,433,743.85/73,128.90
  6. Step 6: Final answer
    x = 34,821.17

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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.