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Finding the Fourth Proportional to 45,859.79, 68,789.79 and 12,580.34

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Solution

The fourth proportional to 45,859.79, 68,789.79 and 12,580.34 is: 18,870.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,859.79 : 68,789.79 = 12,580.34 : x
  2. Step 2: Convert to fraction form
    45,859.79/68,789.79 = 12,580.34/x
  3. Step 3: Cross multiply
    45,859.79x = 68,789.79 × 12,580.34
  4. Step 4: Simplify right side
    45,859.79x = 865,398,602.78
  5. Step 5: Solve for x
    x = 865,398,602.78/45,859.79
  6. Step 6: Final answer
    x = 18,870.53

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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.