Home / 145,203.45-200,390.73-80,680.47

Finding the Fourth Proportional to 145,203.45, 200,390.73 and 80,680.47

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Solution

The fourth proportional to 145,203.45, 200,390.73 and 80,680.47 is: 111,344.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,203.45 : 200,390.73 = 80,680.47 : x
  2. Step 2: Convert to fraction form
    145,203.45/200,390.73 = 80,680.47/x
  3. Step 3: Cross multiply
    145,203.45x = 200,390.73 × 80,680.47
  4. Step 4: Simplify right side
    145,203.45x = 16,167,618,280.04
  5. Step 5: Solve for x
    x = 16,167,618,280.04/145,203.45
  6. Step 6: Final answer
    x = 111,344.59

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1.5x scale

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.