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Finding the Fourth Proportional to 85,604.76, 128,420.96 and 26,426.61

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Solution

The fourth proportional to 85,604.76, 128,420.96 and 26,426.61 is: 39,644.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,604.76 : 128,420.96 = 26,426.61 : x
  2. Step 2: Convert to fraction form
    85,604.76/128,420.96 = 26,426.61/x
  3. Step 3: Cross multiply
    85,604.76x = 128,420.96 × 26,426.61
  4. Step 4: Simplify right side
    85,604.76x = 3,393,730,493.61
  5. Step 5: Solve for x
    x = 3,393,730,493.61/85,604.76
  6. Step 6: Final answer
    x = 39,644.18

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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.