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Finding the Fourth Proportional to 51,293.60, 76,929.60 and 21,712.40

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Solution

The fourth proportional to 51,293.60, 76,929.60 and 21,712.40 is: 32,564.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,293.60 : 76,929.60 = 21,712.40 : x
  2. Step 2: Convert to fraction form
    51,293.60/76,929.60 = 21,712.40/x
  3. Step 3: Cross multiply
    51,293.60x = 76,929.60 × 21,712.40
  4. Step 4: Simplify right side
    51,293.60x = 1,670,326,247.04
  5. Step 5: Solve for x
    x = 1,670,326,247.04/51,293.60
  6. Step 6: Final answer
    x = 32,564.03

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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.