Home / 72,239.91-99,690.31-40,409.07

Finding the Fourth Proportional to 72,239.91, 99,690.31 and 40,409.07

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Solution

The fourth proportional to 72,239.91, 99,690.31 and 40,409.07 is: 55,764.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,239.91 : 99,690.31 = 40,409.07 : x
  2. Step 2: Convert to fraction form
    72,239.91/99,690.31 = 40,409.07/x
  3. Step 3: Cross multiply
    72,239.91x = 99,690.31 × 40,409.07
  4. Step 4: Simplify right side
    72,239.91x = 4,028,392,715.11
  5. Step 5: Solve for x
    x = 4,028,392,715.11/72,239.91
  6. Step 6: Final answer
    x = 55,764.09

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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.