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Finding the Fourth Proportional to 72,886.60, 100,579.44 and 40,179.96

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Solution

The fourth proportional to 72,886.60, 100,579.44 and 40,179.96 is: 55,446.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,886.60 : 100,579.44 = 40,179.96 : x
  2. Step 2: Convert to fraction form
    72,886.60/100,579.44 = 40,179.96/x
  3. Step 3: Cross multiply
    72,886.60x = 100,579.44 × 40,179.96
  4. Step 4: Simplify right side
    72,886.60x = 4,041,277,423.51
  5. Step 5: Solve for x
    x = 4,041,277,423.51/72,886.60
  6. Step 6: Final answer
    x = 55,446.10

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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.