Home / 145,382.85-200,644.29-81,719.28

Finding the Fourth Proportional to 145,382.85, 200,644.29 and 81,719.28

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Solution

The fourth proportional to 145,382.85, 200,644.29 and 81,719.28 is: 112,781.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,382.85 : 200,644.29 = 81,719.28 : x
  2. Step 2: Convert to fraction form
    145,382.85/200,644.29 = 81,719.28/x
  3. Step 3: Cross multiply
    145,382.85x = 200,644.29 × 81,719.28
  4. Step 4: Simplify right side
    145,382.85x = 16,396,506,914.91
  5. Step 5: Solve for x
    x = 16,396,506,914.91/145,382.85
  6. Step 6: Final answer
    x = 112,781.58

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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.