Home / 51,416.28-77,136-18,138.72

Finding the Fourth Proportional to 51,416.28, 77,136 and 18,138.72

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Solution

The fourth proportional to 51,416.28, 77,136 and 18,138.72 is: 27,212.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,416.28 : 77,136 = 18,138.72 : x
  2. Step 2: Convert to fraction form
    51,416.28/77,136 = 18,138.72/x
  3. Step 3: Cross multiply
    51,416.28x = 77,136 × 18,138.72
  4. Step 4: Simplify right side
    51,416.28x = 1,399,148,305.92
  5. Step 5: Solve for x
    x = 1,399,148,305.92/51,416.28
  6. Step 6: Final answer
    x = 27,212.17

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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.