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Finding the Fourth Proportional to 86,601.42, 129,905.64 and 27,435.78

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Solution

The fourth proportional to 86,601.42, 129,905.64 and 27,435.78 is: 41,154.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,601.42 : 129,905.64 = 27,435.78 : x
  2. Step 2: Convert to fraction form
    86,601.42/129,905.64 = 27,435.78/x
  3. Step 3: Cross multiply
    86,601.42x = 129,905.64 × 27,435.78
  4. Step 4: Simplify right side
    86,601.42x = 3,564,062,559.80
  5. Step 5: Solve for x
    x = 3,564,062,559.80/86,601.42
  6. Step 6: Final answer
    x = 41,154.78

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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.