Home / 78,038.20-117,089.70-49,989.88

Finding the Fourth Proportional to 78,038.20, 117,089.70 and 49,989.88

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Solution

The fourth proportional to 78,038.20, 117,089.70 and 49,989.88 is: 75,005.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,038.20 : 117,089.70 = 49,989.88 : x
  2. Step 2: Convert to fraction form
    78,038.20/117,089.70 = 49,989.88/x
  3. Step 3: Cross multiply
    78,038.20x = 117,089.70 × 49,989.88
  4. Step 4: Simplify right side
    78,038.20x = 5,853,300,052.24
  5. Step 5: Solve for x
    x = 5,853,300,052.24/78,038.20
  6. Step 6: Final answer
    x = 75,005.57

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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.