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Finding the Fourth Proportional to 266,649.09, 399,973.65 and 79,660.59

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Solution

The fourth proportional to 266,649.09, 399,973.65 and 79,660.59 is: 119,490.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,649.09 : 399,973.65 = 79,660.59 : x
  2. Step 2: Convert to fraction form
    266,649.09/399,973.65 = 79,660.59/x
  3. Step 3: Cross multiply
    266,649.09x = 399,973.65 × 79,660.59
  4. Step 4: Simplify right side
    266,649.09x = 31,862,136,943.45
  5. Step 5: Solve for x
    x = 31,862,136,943.45/266,649.09
  6. Step 6: Final answer
    x = 119,490.89

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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.