Home / 72,231.18-99,678.45-40,400.05

Finding the Fourth Proportional to 72,231.18, 99,678.45 and 40,400.05

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Solution

The fourth proportional to 72,231.18, 99,678.45 and 40,400.05 is: 55,751.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,231.18 : 99,678.45 = 40,400.05 : x
  2. Step 2: Convert to fraction form
    72,231.18/99,678.45 = 40,400.05/x
  3. Step 3: Cross multiply
    72,231.18x = 99,678.45 × 40,400.05
  4. Step 4: Simplify right side
    72,231.18x = 4,027,014,363.92
  5. Step 5: Solve for x
    x = 4,027,014,363.92/72,231.18
  6. Step 6: Final answer
    x = 55,751.75

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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.