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Finding the Fourth Proportional to 85,898.17, 128,859.54 and 26,739.82

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Solution

The fourth proportional to 85,898.17, 128,859.54 and 26,739.82 is: 40,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,898.17 : 128,859.54 = 26,739.82 : x
  2. Step 2: Convert to fraction form
    85,898.17/128,859.54 = 26,739.82/x
  3. Step 3: Cross multiply
    85,898.17x = 128,859.54 × 26,739.82
  4. Step 4: Simplify right side
    85,898.17x = 3,445,680,904.88
  5. Step 5: Solve for x
    x = 3,445,680,904.88/85,898.17
  6. Step 6: Final answer
    x = 40,113.55

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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.