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Finding the Fourth Proportional to 61,338.92, 91,953.68 and 21,887.28

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Solution

The fourth proportional to 61,338.92, 91,953.68 and 21,887.28 is: 32,811.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,338.92 : 91,953.68 = 21,887.28 : x
  2. Step 2: Convert to fraction form
    61,338.92/91,953.68 = 21,887.28/x
  3. Step 3: Cross multiply
    61,338.92x = 91,953.68 × 21,887.28
  4. Step 4: Simplify right side
    61,338.92x = 2,012,615,831.75
  5. Step 5: Solve for x
    x = 2,012,615,831.75/61,338.92
  6. Step 6: Final answer
    x = 32,811.40

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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.