Home / 78,051.28-107,763.52-51,239.38

Finding the Fourth Proportional to 78,051.28, 107,763.52 and 51,239.38

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Solution

The fourth proportional to 78,051.28, 107,763.52 and 51,239.38 is: 70,744.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,051.28 : 107,763.52 = 51,239.38 : x
  2. Step 2: Convert to fraction form
    78,051.28/107,763.52 = 51,239.38/x
  3. Step 3: Cross multiply
    78,051.28x = 107,763.52 × 51,239.38
  4. Step 4: Simplify right side
    78,051.28x = 5,521,735,951.42
  5. Step 5: Solve for x
    x = 5,521,735,951.42/78,051.28
  6. Step 6: Final answer
    x = 70,744.98

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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.