Home / 85,975.66-129,056.91-72,710.43

Finding the Fourth Proportional to 85,975.66, 129,056.91 and 72,710.43

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Solution

The fourth proportional to 85,975.66, 129,056.91 and 72,710.43 is: 109,144.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,975.66 : 129,056.91 = 72,710.43 : x
  2. Step 2: Convert to fraction form
    85,975.66/129,056.91 = 72,710.43/x
  3. Step 3: Cross multiply
    85,975.66x = 129,056.91 × 72,710.43
  4. Step 4: Simplify right side
    85,975.66x = 9,383,783,420.57
  5. Step 5: Solve for x
    x = 9,383,783,420.57/85,975.66
  6. Step 6: Final answer
    x = 109,144.65

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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.