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Finding the Fourth Proportional to 266,403.25, 399,595.65 and 66,725.37

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Solution

The fourth proportional to 266,403.25, 399,595.65 and 66,725.37 is: 100,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,403.25 : 399,595.65 = 66,725.37 : x
  2. Step 2: Convert to fraction form
    266,403.25/399,595.65 = 66,725.37/x
  3. Step 3: Cross multiply
    266,403.25x = 399,595.65 × 66,725.37
  4. Step 4: Simplify right side
    266,403.25x = 26,663,167,909.42
  5. Step 5: Solve for x
    x = 26,663,167,909.42/266,403.25
  6. Step 6: Final answer
    x = 100,085.74

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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.