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Finding the Fourth Proportional to 266,090.84, 399,253.19 and 139,701.72

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Solution

The fourth proportional to 266,090.84, 399,253.19 and 139,701.72 is: 209,613.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,090.84 : 399,253.19 = 139,701.72 : x
  2. Step 2: Convert to fraction form
    266,090.84/399,253.19 = 139,701.72/x
  3. Step 3: Cross multiply
    266,090.84x = 399,253.19 × 139,701.72
  4. Step 4: Simplify right side
    266,090.84x = 55,776,356,659.98
  5. Step 5: Solve for x
    x = 55,776,356,659.98/266,090.84
  6. Step 6: Final answer
    x = 209,613.97

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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.