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Finding the Fourth Proportional to 86,298.94, 129,453.99 and 27,136.90

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Solution

The fourth proportional to 86,298.94, 129,453.99 and 27,136.90 is: 40,707.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,298.94 : 129,453.99 = 27,136.90 : x
  2. Step 2: Convert to fraction form
    86,298.94/129,453.99 = 27,136.90/x
  3. Step 3: Cross multiply
    86,298.94x = 129,453.99 × 27,136.90
  4. Step 4: Simplify right side
    86,298.94x = 3,512,979,981.23
  5. Step 5: Solve for x
    x = 3,512,979,981.23/86,298.94
  6. Step 6: Final answer
    x = 40,707.10

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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.