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Finding the Fourth Proportional to 84,685.68, 127,028.57 and 21,510.54

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Solution

The fourth proportional to 84,685.68, 127,028.57 and 21,510.54 is: 32,265.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,685.68 : 127,028.57 = 21,510.54 : x
  2. Step 2: Convert to fraction form
    84,685.68/127,028.57 = 21,510.54/x
  3. Step 3: Cross multiply
    84,685.68x = 127,028.57 × 21,510.54
  4. Step 4: Simplify right side
    84,685.68x = 2,732,453,028.58
  5. Step 5: Solve for x
    x = 2,732,453,028.58/84,685.68
  6. Step 6: Final answer
    x = 32,265.82

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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.