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Finding the Fourth Proportional to 72,785.84, 100,357.80 and 48,861.68

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Solution

The fourth proportional to 72,785.84, 100,357.80 and 48,861.68 is: 67,370.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,785.84 : 100,357.80 = 48,861.68 : x
  2. Step 2: Convert to fraction form
    72,785.84/100,357.80 = 48,861.68/x
  3. Step 3: Cross multiply
    72,785.84x = 100,357.80 × 48,861.68
  4. Step 4: Simplify right side
    72,785.84x = 4,903,650,709.10
  5. Step 5: Solve for x
    x = 4,903,650,709.10/72,785.84
  6. Step 6: Final answer
    x = 67,370.94

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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.