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Finding the Fourth Proportional to 81,993.84, 112,913.28 and 71,233.80

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Solution

The fourth proportional to 81,993.84, 112,913.28 and 71,233.80 is: 98,095.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,993.84 : 112,913.28 = 71,233.80 : x
  2. Step 2: Convert to fraction form
    81,993.84/112,913.28 = 71,233.80/x
  3. Step 3: Cross multiply
    81,993.84x = 112,913.28 × 71,233.80
  4. Step 4: Simplify right side
    81,993.84x = 8,043,242,004.86
  5. Step 5: Solve for x
    x = 8,043,242,004.86/81,993.84
  6. Step 6: Final answer
    x = 98,095.69

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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.