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Finding the Fourth Proportional to 85,869.71, 128,822.79 and 25,900.01

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Solution

The fourth proportional to 85,869.71, 128,822.79 and 25,900.01 is: 38,855.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,869.71 : 128,822.79 = 25,900.01 : x
  2. Step 2: Convert to fraction form
    85,869.71/128,822.79 = 25,900.01/x
  3. Step 3: Cross multiply
    85,869.71x = 128,822.79 × 25,900.01
  4. Step 4: Simplify right side
    85,869.71x = 3,336,511,549.23
  5. Step 5: Solve for x
    x = 3,336,511,549.23/85,869.71
  6. Step 6: Final answer
    x = 38,855.51

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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.