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Finding the Fourth Proportional to 81,461.80, 112,380.78 and 49,628.80

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Solution

The fourth proportional to 81,461.80, 112,380.78 and 49,628.80 is: 68,465.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,461.80 : 112,380.78 = 49,628.80 : x
  2. Step 2: Convert to fraction form
    81,461.80/112,380.78 = 49,628.80/x
  3. Step 3: Cross multiply
    81,461.80x = 112,380.78 × 49,628.80
  4. Step 4: Simplify right side
    81,461.80x = 5,577,323,254.46
  5. Step 5: Solve for x
    x = 5,577,323,254.46/81,461.80
  6. Step 6: Final answer
    x = 68,465.50

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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.