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Finding the Fourth Proportional to 100,631.62, 138,860.48 and 60,347.08

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Solution

The fourth proportional to 100,631.62, 138,860.48 and 60,347.08 is: 83,272.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,631.62 : 138,860.48 = 60,347.08 : x
  2. Step 2: Convert to fraction form
    100,631.62/138,860.48 = 60,347.08/x
  3. Step 3: Cross multiply
    100,631.62x = 138,860.48 × 60,347.08
  4. Step 4: Simplify right side
    100,631.62x = 8,379,823,499.36
  5. Step 5: Solve for x
    x = 8,379,823,499.36/100,631.62
  6. Step 6: Final answer
    x = 83,272.27

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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.