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Finding the Fourth Proportional to 208,398.36, 312,588.80 and 88,422.38

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Solution

The fourth proportional to 208,398.36, 312,588.80 and 88,422.38 is: 132,629.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,398.36 : 312,588.80 = 88,422.38 : x
  2. Step 2: Convert to fraction form
    208,398.36/312,588.80 = 88,422.38/x
  3. Step 3: Cross multiply
    208,398.36x = 312,588.80 × 88,422.38
  4. Step 4: Simplify right side
    208,398.36x = 27,639,845,657.34
  5. Step 5: Solve for x
    x = 27,639,845,657.34/208,398.36
  6. Step 6: Final answer
    x = 132,629.86

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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.