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Finding the Fourth Proportional to 81,813.99, 112,959.21 and 62,659.92

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Solution

The fourth proportional to 81,813.99, 112,959.21 and 62,659.92 is: 86,513.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,813.99 : 112,959.21 = 62,659.92 : x
  2. Step 2: Convert to fraction form
    81,813.99/112,959.21 = 62,659.92/x
  3. Step 3: Cross multiply
    81,813.99x = 112,959.21 × 62,659.92
  4. Step 4: Simplify right side
    81,813.99x = 7,078,015,061.86
  5. Step 5: Solve for x
    x = 7,078,015,061.86/81,813.99
  6. Step 6: Final answer
    x = 86,513.51

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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.