Home / 72,039.72-99,405.65-40,209.96

Finding the Fourth Proportional to 72,039.72, 99,405.65 and 40,209.96

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Solution

The fourth proportional to 72,039.72, 99,405.65 and 40,209.96 is: 55,484.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,039.72 : 99,405.65 = 40,209.96 : x
  2. Step 2: Convert to fraction form
    72,039.72/99,405.65 = 40,209.96/x
  3. Step 3: Cross multiply
    72,039.72x = 99,405.65 × 40,209.96
  4. Step 4: Simplify right side
    72,039.72x = 3,997,097,382.00
  5. Step 5: Solve for x
    x = 3,997,097,382.00/72,039.72
  6. Step 6: Final answer
    x = 55,484.63

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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.