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Finding the Fourth Proportional to 266,935.06, 400,390.10 and 77,389.79

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Solution

The fourth proportional to 266,935.06, 400,390.10 and 77,389.79 is: 116,081.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,935.06 : 400,390.10 = 77,389.79 : x
  2. Step 2: Convert to fraction form
    266,935.06/400,390.10 = 77,389.79/x
  3. Step 3: Cross multiply
    266,935.06x = 400,390.10 × 77,389.79
  4. Step 4: Simplify right side
    266,935.06x = 30,986,105,370.13
  5. Step 5: Solve for x
    x = 30,986,105,370.13/266,935.06
  6. Step 6: Final answer
    x = 116,081.06

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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.