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Finding the Fourth Proportional to 77,481.85, 116,222.70 and 21,322.28

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Solution

The fourth proportional to 77,481.85, 116,222.70 and 21,322.28 is: 31,983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,481.85 : 116,222.70 = 21,322.28 : x
  2. Step 2: Convert to fraction form
    77,481.85/116,222.70 = 21,322.28/x
  3. Step 3: Cross multiply
    77,481.85x = 116,222.70 × 21,322.28
  4. Step 4: Simplify right side
    77,481.85x = 2,478,132,951.76
  5. Step 5: Solve for x
    x = 2,478,132,951.76/77,481.85
  6. Step 6: Final answer
    x = 31,983.40

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1.5x scale

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.