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Finding the Fourth Proportional to 71,877.63, 99,191.81 and 39,613.42

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Solution

The fourth proportional to 71,877.63, 99,191.81 and 39,613.42 is: 54,666.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,877.63 : 99,191.81 = 39,613.42 : x
  2. Step 2: Convert to fraction form
    71,877.63/99,191.81 = 39,613.42/x
  3. Step 3: Cross multiply
    71,877.63x = 99,191.81 × 39,613.42
  4. Step 4: Simplify right side
    71,877.63x = 3,929,326,683.39
  5. Step 5: Solve for x
    x = 3,929,326,683.39/71,877.63
  6. Step 6: Final answer
    x = 54,666.89

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1.5x scale

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.