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Finding the Fourth Proportional to 100,348.23, 138,486.95 and 66,296.98

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Solution

The fourth proportional to 100,348.23, 138,486.95 and 66,296.98 is: 91,494.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,348.23 : 138,486.95 = 66,296.98 : x
  2. Step 2: Convert to fraction form
    100,348.23/138,486.95 = 66,296.98/x
  3. Step 3: Cross multiply
    100,348.23x = 138,486.95 × 66,296.98
  4. Step 4: Simplify right side
    100,348.23x = 9,181,266,554.41
  5. Step 5: Solve for x
    x = 9,181,266,554.41/100,348.23
  6. Step 6: Final answer
    x = 91,494.06

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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.