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Finding the Fourth Proportional to 65,763.32, 90,737.70 and 38,903.72

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Solution

The fourth proportional to 65,763.32, 90,737.70 and 38,903.72 is: 53,677.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,763.32 : 90,737.70 = 38,903.72 : x
  2. Step 2: Convert to fraction form
    65,763.32/90,737.70 = 38,903.72/x
  3. Step 3: Cross multiply
    65,763.32x = 90,737.70 × 38,903.72
  4. Step 4: Simplify right side
    65,763.32x = 3,530,034,074.24
  5. Step 5: Solve for x
    x = 3,530,034,074.24/65,763.32
  6. Step 6: Final answer
    x = 53,677.86

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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.