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Finding the Fourth Proportional to 98,338.40, 135,672 and 58,031.99

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Solution

The fourth proportional to 98,338.40, 135,672 and 58,031.99 is: 80,063.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,338.40 : 135,672 = 58,031.99 : x
  2. Step 2: Convert to fraction form
    98,338.40/135,672 = 58,031.99/x
  3. Step 3: Cross multiply
    98,338.40x = 135,672 × 58,031.99
  4. Step 4: Simplify right side
    98,338.40x = 7,873,316,147.28
  5. Step 5: Solve for x
    x = 7,873,316,147.28/98,338.40
  6. Step 6: Final answer
    x = 80,063.50

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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.