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Finding the Fourth Proportional to 145,634.76, 200,963.15 and 81,099.12

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Solution

The fourth proportional to 145,634.76, 200,963.15 and 81,099.12 is: 111,909.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,634.76 : 200,963.15 = 81,099.12 : x
  2. Step 2: Convert to fraction form
    145,634.76/200,963.15 = 81,099.12/x
  3. Step 3: Cross multiply
    145,634.76x = 200,963.15 × 81,099.12
  4. Step 4: Simplify right side
    145,634.76x = 16,297,934,317.77
  5. Step 5: Solve for x
    x = 16,297,934,317.77/145,634.76
  6. Step 6: Final answer
    x = 111,909.65

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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.