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Finding the Fourth Proportional to 65,286.61, 90,146.31 and 50,155.40

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Solution

The fourth proportional to 65,286.61, 90,146.31 and 50,155.40 is: 69,253.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,286.61 : 90,146.31 = 50,155.40 : x
  2. Step 2: Convert to fraction form
    65,286.61/90,146.31 = 50,155.40/x
  3. Step 3: Cross multiply
    65,286.61x = 90,146.31 × 50,155.40
  4. Step 4: Simplify right side
    65,286.61x = 4,521,324,236.57
  5. Step 5: Solve for x
    x = 4,521,324,236.57/65,286.61
  6. Step 6: Final answer
    x = 69,253.47

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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.