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Finding the Fourth Proportional to 85,797.30, 128,713.14 and 29,639.46

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Solution

The fourth proportional to 85,797.30, 128,713.14 and 29,639.46 is: 44,465.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,797.30 : 128,713.14 = 29,639.46 : x
  2. Step 2: Convert to fraction form
    85,797.30/128,713.14 = 29,639.46/x
  3. Step 3: Cross multiply
    85,797.30x = 128,713.14 × 29,639.46
  4. Step 4: Simplify right side
    85,797.30x = 3,814,987,964.50
  5. Step 5: Solve for x
    x = 3,814,987,964.50/85,797.30
  6. Step 6: Final answer
    x = 44,465.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.