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Finding the Fourth Proportional to 72,417.09, 99,930.09 and 40,579.84

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Solution

The fourth proportional to 72,417.09, 99,930.09 and 40,579.84 is: 55,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,417.09 : 99,930.09 = 40,579.84 : x
  2. Step 2: Convert to fraction form
    72,417.09/99,930.09 = 40,579.84/x
  3. Step 3: Cross multiply
    72,417.09x = 99,930.09 × 40,579.84
  4. Step 4: Simplify right side
    72,417.09x = 4,055,147,063.39
  5. Step 5: Solve for x
    x = 4,055,147,063.39/72,417.09
  6. Step 6: Final answer
    x = 55,997.10

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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.