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Finding the Fourth Proportional to 312,549.88, 468,837.76 and 90,933.88

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Solution

The fourth proportional to 312,549.88, 468,837.76 and 90,933.88 is: 136,404.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,549.88 : 468,837.76 = 90,933.88 : x
  2. Step 2: Convert to fraction form
    312,549.88/468,837.76 = 90,933.88/x
  3. Step 3: Cross multiply
    312,549.88x = 468,837.76 × 90,933.88
  4. Step 4: Simplify right side
    312,549.88x = 42,633,236,607.31
  5. Step 5: Solve for x
    x = 42,633,236,607.31/312,549.88
  6. Step 6: Final answer
    x = 136,404.58

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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.