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Finding the Fourth Proportional to 65,608.80, 90,508.96 and 38,733.30

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Solution

The fourth proportional to 65,608.80, 90,508.96 and 38,733.30 is: 53,433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,608.80 : 90,508.96 = 38,733.30 : x
  2. Step 2: Convert to fraction form
    65,608.80/90,508.96 = 38,733.30/x
  3. Step 3: Cross multiply
    65,608.80x = 90,508.96 × 38,733.30
  4. Step 4: Simplify right side
    65,608.80x = 3,505,710,809.55
  5. Step 5: Solve for x
    x = 3,505,710,809.55/65,608.80
  6. Step 6: Final answer
    x = 53,433.55

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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.