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Finding the Fourth Proportional to 266,721.80, 368,110.90 and 153,549.32

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Solution

The fourth proportional to 266,721.80, 368,110.90 and 153,549.32 is: 211,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,721.80 : 368,110.90 = 153,549.32 : x
  2. Step 2: Convert to fraction form
    266,721.80/368,110.90 = 153,549.32/x
  3. Step 3: Cross multiply
    266,721.80x = 368,110.90 × 153,549.32
  4. Step 4: Simplify right side
    266,721.80x = 56,523,178,379.59
  5. Step 5: Solve for x
    x = 56,523,178,379.59/266,721.80
  6. Step 6: Final answer
    x = 211,918.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.