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Finding the Fourth Proportional to 266,072.64, 399,175.20 and 79,079.04

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Solution

The fourth proportional to 266,072.64, 399,175.20 and 79,079.04 is: 118,638.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,072.64 : 399,175.20 = 79,079.04 : x
  2. Step 2: Convert to fraction form
    266,072.64/399,175.20 = 79,079.04/x
  3. Step 3: Cross multiply
    266,072.64x = 399,175.20 × 79,079.04
  4. Step 4: Simplify right side
    266,072.64x = 31,566,391,607.81
  5. Step 5: Solve for x
    x = 31,566,391,607.81/266,072.64
  6. Step 6: Final answer
    x = 118,638.25

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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.