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Finding the Fourth Proportional to 65,403.87, 90,266.50 and 38,188.86

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Solution

The fourth proportional to 65,403.87, 90,266.50 and 38,188.86 is: 52,705.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,403.87 : 90,266.50 = 38,188.86 : x
  2. Step 2: Convert to fraction form
    65,403.87/90,266.50 = 38,188.86/x
  3. Step 3: Cross multiply
    65,403.87x = 90,266.50 × 38,188.86
  4. Step 4: Simplify right side
    65,403.87x = 3,447,174,731.19
  5. Step 5: Solve for x
    x = 3,447,174,731.19/65,403.87
  6. Step 6: Final answer
    x = 52,705.97

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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.