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Finding the Fourth Proportional to 85,136.61, 127,704.54 and 25,972.08

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Solution

The fourth proportional to 85,136.61, 127,704.54 and 25,972.08 is: 38,958.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,136.61 : 127,704.54 = 25,972.08 : x
  2. Step 2: Convert to fraction form
    85,136.61/127,704.54 = 25,972.08/x
  3. Step 3: Cross multiply
    85,136.61x = 127,704.54 × 25,972.08
  4. Step 4: Simplify right side
    85,136.61x = 3,316,752,529.24
  5. Step 5: Solve for x
    x = 3,316,752,529.24/85,136.61
  6. Step 6: Final answer
    x = 38,958.01

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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.