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Finding the Fourth Proportional to 65,431.92, 90,123.96 and 50,295.60

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Solution

The fourth proportional to 65,431.92, 90,123.96 and 50,295.60 is: 69,275.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,431.92 : 90,123.96 = 50,295.60 : x
  2. Step 2: Convert to fraction form
    65,431.92/90,123.96 = 50,295.60/x
  3. Step 3: Cross multiply
    65,431.92x = 90,123.96 × 50,295.60
  4. Step 4: Simplify right side
    65,431.92x = 4,532,838,642.58
  5. Step 5: Solve for x
    x = 4,532,838,642.58/65,431.92
  6. Step 6: Final answer
    x = 69,275.65

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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.