Home / 145,272.81-200,475.07-80,742.20

Finding the Fourth Proportional to 145,272.81, 200,475.07 and 80,742.20

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Solution

The fourth proportional to 145,272.81, 200,475.07 and 80,742.20 is: 111,423.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,272.81 : 200,475.07 = 80,742.20 : x
  2. Step 2: Convert to fraction form
    145,272.81/200,475.07 = 80,742.20/x
  3. Step 3: Cross multiply
    145,272.81x = 200,475.07 × 80,742.20
  4. Step 4: Simplify right side
    145,272.81x = 16,186,796,992.72
  5. Step 5: Solve for x
    x = 16,186,796,992.72/145,272.81
  6. Step 6: Final answer
    x = 111,423.44

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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.