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Finding the Fourth Proportional to 93,809.21, 129,469.28 and 55,565.78

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Solution

The fourth proportional to 93,809.21, 129,469.28 and 55,565.78 is: 76,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,809.21 : 129,469.28 = 55,565.78 : x
  2. Step 2: Convert to fraction form
    93,809.21/129,469.28 = 55,565.78/x
  3. Step 3: Cross multiply
    93,809.21x = 129,469.28 × 55,565.78
  4. Step 4: Simplify right side
    93,809.21x = 7,194,060,604.06
  5. Step 5: Solve for x
    x = 7,194,060,604.06/93,809.21
  6. Step 6: Final answer
    x = 76,688.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.