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Finding the Fourth Proportional to 51,990.88, 78,026.43 and 38,693.92

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Solution

The fourth proportional to 51,990.88, 78,026.43 and 38,693.92 is: 58,070.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,990.88 : 78,026.43 = 38,693.92 : x
  2. Step 2: Convert to fraction form
    51,990.88/78,026.43 = 38,693.92/x
  3. Step 3: Cross multiply
    51,990.88x = 78,026.43 × 38,693.92
  4. Step 4: Simplify right side
    51,990.88x = 3,019,148,440.31
  5. Step 5: Solve for x
    x = 3,019,148,440.31/51,990.88
  6. Step 6: Final answer
    x = 58,070.73

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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.