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Finding the Fourth Proportional to 78,975.90, 108,986.72 and 44,987.54

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Solution

The fourth proportional to 78,975.90, 108,986.72 and 44,987.54 is: 62,082.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,975.90 : 108,986.72 = 44,987.54 : x
  2. Step 2: Convert to fraction form
    78,975.90/108,986.72 = 44,987.54/x
  3. Step 3: Cross multiply
    78,975.90x = 108,986.72 × 44,987.54
  4. Step 4: Simplify right side
    78,975.90x = 4,903,044,425.47
  5. Step 5: Solve for x
    x = 4,903,044,425.47/78,975.90
  6. Step 6: Final answer
    x = 62,082.79

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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.