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Finding the Fourth Proportional to 90,660.85, 125,059.85 and 56,610.23

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Solution

The fourth proportional to 90,660.85, 125,059.85 and 56,610.23 is: 78,089.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,660.85 : 125,059.85 = 56,610.23 : x
  2. Step 2: Convert to fraction form
    90,660.85/125,059.85 = 56,610.23/x
  3. Step 3: Cross multiply
    90,660.85x = 125,059.85 × 56,610.23
  4. Step 4: Simplify right side
    90,660.85x = 7,079,666,176.20
  5. Step 5: Solve for x
    x = 7,079,666,176.20/90,660.85
  6. Step 6: Final answer
    x = 78,089.57

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1.5x scale

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.