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Finding the Fourth Proportional to 139,953.48, 209,891.80 and 83,749.36

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Solution

The fourth proportional to 139,953.48, 209,891.80 and 83,749.36 is: 125,601.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,953.48 : 209,891.80 = 83,749.36 : x
  2. Step 2: Convert to fraction form
    139,953.48/209,891.80 = 83,749.36/x
  3. Step 3: Cross multiply
    139,953.48x = 209,891.80 × 83,749.36
  4. Step 4: Simplify right side
    139,953.48x = 17,578,303,919.25
  5. Step 5: Solve for x
    x = 17,578,303,919.25/139,953.48
  6. Step 6: Final answer
    x = 125,601.05

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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.