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Finding the Fourth Proportional to 266,030.80, 399,305.40 and 133,061.20

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Solution

The fourth proportional to 266,030.80, 399,305.40 and 133,061.20 is: 199,721.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,030.80 : 399,305.40 = 133,061.20 : x
  2. Step 2: Convert to fraction form
    266,030.80/399,305.40 = 133,061.20/x
  3. Step 3: Cross multiply
    266,030.80x = 399,305.40 × 133,061.20
  4. Step 4: Simplify right side
    266,030.80x = 53,132,055,690.48
  5. Step 5: Solve for x
    x = 53,132,055,690.48/266,030.80
  6. Step 6: Final answer
    x = 199,721.44

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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.