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Finding the Fourth Proportional to 266,978.01, 368,562.96 and 153,778.89

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Solution

The fourth proportional to 266,978.01, 368,562.96 and 153,778.89 is: 212,291.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,978.01 : 368,562.96 = 153,778.89 : x
  2. Step 2: Convert to fraction form
    266,978.01/368,562.96 = 153,778.89/x
  3. Step 3: Cross multiply
    266,978.01x = 368,562.96 × 153,778.89
  4. Step 4: Simplify right side
    266,978.01x = 56,677,202,883.91
  5. Step 5: Solve for x
    x = 56,677,202,883.91/266,978.01
  6. Step 6: Final answer
    x = 212,291.65

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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.