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Finding the Fourth Proportional to 81,871.84, 122,812.08 and 26,472.16

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Solution

The fourth proportional to 81,871.84, 122,812.08 and 26,472.16 is: 39,709.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,871.84 : 122,812.08 = 26,472.16 : x
  2. Step 2: Convert to fraction form
    81,871.84/122,812.08 = 26,472.16/x
  3. Step 3: Cross multiply
    81,871.84x = 122,812.08 × 26,472.16
  4. Step 4: Simplify right side
    81,871.84x = 3,251,101,031.69
  5. Step 5: Solve for x
    x = 3,251,101,031.69/81,871.84
  6. Step 6: Final answer
    x = 39,709.64

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1.5x scale

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.