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Finding the Fourth Proportional to 90,715, 125,186.70 and 52,989.52

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Solution

The fourth proportional to 90,715, 125,186.70 and 52,989.52 is: 73,125.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,715 : 125,186.70 = 52,989.52 : x
  2. Step 2: Convert to fraction form
    90,715/125,186.70 = 52,989.52/x
  3. Step 3: Cross multiply
    90,715x = 125,186.70 × 52,989.52
  4. Step 4: Simplify right side
    90,715x = 6,633,583,143.38
  5. Step 5: Solve for x
    x = 6,633,583,143.38/90,715
  6. Step 6: Final answer
    x = 73,125.54

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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.