Home / 145,540.52-200,845.12-81,878.72

Finding the Fourth Proportional to 145,540.52, 200,845.12 and 81,878.72

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Solution

The fourth proportional to 145,540.52, 200,845.12 and 81,878.72 is: 112,992.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,540.52 : 200,845.12 = 81,878.72 : x
  2. Step 2: Convert to fraction form
    145,540.52/200,845.12 = 81,878.72/x
  3. Step 3: Cross multiply
    145,540.52x = 200,845.12 × 81,878.72
  4. Step 4: Simplify right side
    145,540.52x = 16,444,941,343.85
  5. Step 5: Solve for x
    x = 16,444,941,343.85/145,540.52
  6. Step 6: Final answer
    x = 112,992.18

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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.