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Finding the Fourth Proportional to 86,715.77, 119,643.48 and 54,453.87

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Solution

The fourth proportional to 86,715.77, 119,643.48 and 54,453.87 is: 75,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,715.77 : 119,643.48 = 54,453.87 : x
  2. Step 2: Convert to fraction form
    86,715.77/119,643.48 = 54,453.87/x
  3. Step 3: Cross multiply
    86,715.77x = 119,643.48 × 54,453.87
  4. Step 4: Simplify right side
    86,715.77x = 6,515,050,506.27
  5. Step 5: Solve for x
    x = 6,515,050,506.27/86,715.77
  6. Step 6: Final answer
    x = 75,131.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.