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Finding the Fourth Proportional to 72,785.74, 100,446.28 and 40,955.76

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Solution

The fourth proportional to 72,785.74, 100,446.28 and 40,955.76 is: 56,520.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,785.74 : 100,446.28 = 40,955.76 : x
  2. Step 2: Convert to fraction form
    72,785.74/100,446.28 = 40,955.76/x
  3. Step 3: Cross multiply
    72,785.74x = 100,446.28 × 40,955.76
  4. Step 4: Simplify right side
    72,785.74x = 4,113,853,736.57
  5. Step 5: Solve for x
    x = 4,113,853,736.57/72,785.74
  6. Step 6: Final answer
    x = 56,520.05

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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.