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Finding the Fourth Proportional to 266,084.40, 399,126.60 and 139,675.80

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Solution

The fourth proportional to 266,084.40, 399,126.60 and 139,675.80 is: 209,513.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,084.40 : 399,126.60 = 139,675.80 : x
  2. Step 2: Convert to fraction form
    266,084.40/399,126.60 = 139,675.80/x
  3. Step 3: Cross multiply
    266,084.40x = 399,126.60 × 139,675.80
  4. Step 4: Simplify right side
    266,084.40x = 55,748,327,156.28
  5. Step 5: Solve for x
    x = 55,748,327,156.28/266,084.40
  6. Step 6: Final answer
    x = 209,513.70

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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.