Home / 72,218.35-99,665.91-40,389.58

Finding the Fourth Proportional to 72,218.35, 99,665.91 and 40,389.58

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Solution

The fourth proportional to 72,218.35, 99,665.91 and 40,389.58 is: 55,740.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,218.35 : 99,665.91 = 40,389.58 : x
  2. Step 2: Convert to fraction form
    72,218.35/99,665.91 = 40,389.58/x
  3. Step 3: Cross multiply
    72,218.35x = 99,665.91 × 40,389.58
  4. Step 4: Simplify right side
    72,218.35x = 4,025,464,245.22
  5. Step 5: Solve for x
    x = 4,025,464,245.22/72,218.35
  6. Step 6: Final answer
    x = 55,740.19

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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.