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Finding the Fourth Proportional to 78,953.31, 108,950.99 and 43,143.61

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Solution

The fourth proportional to 78,953.31, 108,950.99 and 43,143.61 is: 59,535.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,953.31 : 108,950.99 = 43,143.61 : x
  2. Step 2: Convert to fraction form
    78,953.31/108,950.99 = 43,143.61/x
  3. Step 3: Cross multiply
    78,953.31x = 108,950.99 × 43,143.61
  4. Step 4: Simplify right side
    78,953.31x = 4,700,539,021.67
  5. Step 5: Solve for x
    x = 4,700,539,021.67/78,953.31
  6. Step 6: Final answer
    x = 59,535.68

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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.