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Finding the Fourth Proportional to 61,931.87, 85,451.33 and 36,439.34

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Solution

The fourth proportional to 61,931.87, 85,451.33 and 36,439.34 is: 50,277.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,931.87 : 85,451.33 = 36,439.34 : x
  2. Step 2: Convert to fraction form
    61,931.87/85,451.33 = 36,439.34/x
  3. Step 3: Cross multiply
    61,931.87x = 85,451.33 × 36,439.34
  4. Step 4: Simplify right side
    61,931.87x = 3,113,790,372.05
  5. Step 5: Solve for x
    x = 3,113,790,372.05/61,931.87
  6. Step 6: Final answer
    x = 50,277.68

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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.