Home / 145,811.39-201,219.72-78,743.39

Finding the Fourth Proportional to 145,811.39, 201,219.72 and 78,743.39

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Solution

The fourth proportional to 145,811.39, 201,219.72 and 78,743.39 is: 108,665.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,811.39 : 201,219.72 = 78,743.39 : x
  2. Step 2: Convert to fraction form
    145,811.39/201,219.72 = 78,743.39/x
  3. Step 3: Cross multiply
    145,811.39x = 201,219.72 × 78,743.39
  4. Step 4: Simplify right side
    145,811.39x = 15,844,723,161.06
  5. Step 5: Solve for x
    x = 15,844,723,161.06/145,811.39
  6. Step 6: Final answer
    x = 108,665.88

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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.