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Finding the Fourth Proportional to 65,377.85, 90,191.43 and 38,507.49

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Solution

The fourth proportional to 65,377.85, 90,191.43 and 38,507.49 is: 53,122.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,377.85 : 90,191.43 = 38,507.49 : x
  2. Step 2: Convert to fraction form
    65,377.85/90,191.43 = 38,507.49/x
  3. Step 3: Cross multiply
    65,377.85x = 90,191.43 × 38,507.49
  4. Step 4: Simplify right side
    65,377.85x = 3,473,045,588.81
  5. Step 5: Solve for x
    x = 3,473,045,588.81/65,377.85
  6. Step 6: Final answer
    x = 53,122.67

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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.