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Finding the Fourth Proportional to 100,798.39, 139,043.92 and 63,007.03

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Solution

The fourth proportional to 100,798.39, 139,043.92 and 63,007.03 is: 86,913.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,798.39 : 139,043.92 = 63,007.03 : x
  2. Step 2: Convert to fraction form
    100,798.39/139,043.92 = 63,007.03/x
  3. Step 3: Cross multiply
    100,798.39x = 139,043.92 × 63,007.03
  4. Step 4: Simplify right side
    100,798.39x = 8,760,744,438.76
  5. Step 5: Solve for x
    x = 8,760,744,438.76/100,798.39
  6. Step 6: Final answer
    x = 86,913.54

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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.