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Finding the Fourth Proportional to 83,239.68, 114,869.64 and 47,431.80

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Solution

The fourth proportional to 83,239.68, 114,869.64 and 47,431.80 is: 65,455.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,239.68 : 114,869.64 = 47,431.80 : x
  2. Step 2: Convert to fraction form
    83,239.68/114,869.64 = 47,431.80/x
  3. Step 3: Cross multiply
    83,239.68x = 114,869.64 × 47,431.80
  4. Step 4: Simplify right side
    83,239.68x = 5,448,473,790.55
  5. Step 5: Solve for x
    x = 5,448,473,790.55/83,239.68
  6. Step 6: Final answer
    x = 65,455.25

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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.