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Finding the Fourth Proportional to 266,520.78, 399,938.66 and 98,159.45

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Solution

The fourth proportional to 266,520.78, 399,938.66 and 98,159.45 is: 147,297.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,520.78 : 399,938.66 = 98,159.45 : x
  2. Step 2: Convert to fraction form
    266,520.78/399,938.66 = 98,159.45/x
  3. Step 3: Cross multiply
    266,520.78x = 399,938.66 × 98,159.45
  4. Step 4: Simplify right side
    266,520.78x = 39,257,757,329.09
  5. Step 5: Solve for x
    x = 39,257,757,329.09/266,520.78
  6. Step 6: Final answer
    x = 147,297.17

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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.