Home / 145,155.86-200,327.72-80,637.65

Finding the Fourth Proportional to 145,155.86, 200,327.72 and 80,637.65

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Solution

The fourth proportional to 145,155.86, 200,327.72 and 80,637.65 is: 111,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,155.86 : 200,327.72 = 80,637.65 : x
  2. Step 2: Convert to fraction form
    145,155.86/200,327.72 = 80,637.65/x
  3. Step 3: Cross multiply
    145,155.86x = 200,327.72 × 80,637.65
  4. Step 4: Simplify right side
    145,155.86x = 16,153,956,069.84
  5. Step 5: Solve for x
    x = 16,153,956,069.84/145,155.86
  6. Step 6: Final answer
    x = 111,286.97

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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.