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Finding the Fourth Proportional to 145,480.70, 200,761.44 and 81,818.50

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Solution

The fourth proportional to 145,480.70, 200,761.44 and 81,818.50 is: 112,908.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,480.70 : 200,761.44 = 81,818.50 : x
  2. Step 2: Convert to fraction form
    145,480.70/200,761.44 = 81,818.50/x
  3. Step 3: Cross multiply
    145,480.70x = 200,761.44 × 81,818.50
  4. Step 4: Simplify right side
    145,480.70x = 16,425,999,069.92
  5. Step 5: Solve for x
    x = 16,425,999,069.92/145,480.70
  6. Step 6: Final answer
    x = 112,908.44

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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.