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Finding the Fourth Proportional to 145,171.80, 200,331.90 and 81,512.28

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Solution

The fourth proportional to 145,171.80, 200,331.90 and 81,512.28 is: 112,484.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,171.80 : 200,331.90 = 81,512.28 : x
  2. Step 2: Convert to fraction form
    145,171.80/200,331.90 = 81,512.28/x
  3. Step 3: Cross multiply
    145,171.80x = 200,331.90 × 81,512.28
  4. Step 4: Simplify right side
    145,171.80x = 16,329,509,925.73
  5. Step 5: Solve for x
    x = 16,329,509,925.73/145,171.80
  6. Step 6: Final answer
    x = 112,484.04

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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.