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Finding the Fourth Proportional to 81,760.70, 112,510.94 and 72,351.74

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Solution

The fourth proportional to 81,760.70, 112,510.94 and 72,351.74 is: 99,563.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,760.70 : 112,510.94 = 72,351.74 : x
  2. Step 2: Convert to fraction form
    81,760.70/112,510.94 = 72,351.74/x
  3. Step 3: Cross multiply
    81,760.70x = 112,510.94 × 72,351.74
  4. Step 4: Simplify right side
    81,760.70x = 8,140,362,278.04
  5. Step 5: Solve for x
    x = 8,140,362,278.04/81,760.70
  6. Step 6: Final answer
    x = 99,563.27

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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.