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Finding the Fourth Proportional to 85,633.67, 128,462.79 and 26,473.95

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Solution

The fourth proportional to 85,633.67, 128,462.79 and 26,473.95 is: 39,714.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,633.67 : 128,462.79 = 26,473.95 : x
  2. Step 2: Convert to fraction form
    85,633.67/128,462.79 = 26,473.95/x
  3. Step 3: Cross multiply
    85,633.67x = 128,462.79 × 26,473.95
  4. Step 4: Simplify right side
    85,633.67x = 3,400,917,479.32
  5. Step 5: Solve for x
    x = 3,400,917,479.32/85,633.67
  6. Step 6: Final answer
    x = 39,714.73

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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.