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Finding the Fourth Proportional to 266,043.20, 399,064.80 and 79,054.70

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Solution

The fourth proportional to 266,043.20, 399,064.80 and 79,054.70 is: 118,582.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,043.20 : 399,064.80 = 79,054.70 : x
  2. Step 2: Convert to fraction form
    266,043.20/399,064.80 = 79,054.70/x
  3. Step 3: Cross multiply
    266,043.20x = 399,064.80 × 79,054.70
  4. Step 4: Simplify right side
    266,043.20x = 31,547,948,044.56
  5. Step 5: Solve for x
    x = 31,547,948,044.56/266,043.20
  6. Step 6: Final answer
    x = 118,582.05

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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.