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Finding the Fourth Proportional to 90,427, 124,790.76 and 50,142.46

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Solution

The fourth proportional to 90,427, 124,790.76 and 50,142.46 is: 69,197.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,427 : 124,790.76 = 50,142.46 : x
  2. Step 2: Convert to fraction form
    90,427/124,790.76 = 50,142.46/x
  3. Step 3: Cross multiply
    90,427x = 124,790.76 × 50,142.46
  4. Step 4: Simplify right side
    90,427x = 6,257,315,691.67
  5. Step 5: Solve for x
    x = 6,257,315,691.67/90,427
  6. Step 6: Final answer
    x = 69,197.43

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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.