Home / 72,756.09-109,090.40-27,780.39

Finding the Fourth Proportional to 72,756.09, 109,090.40 and 27,780.39

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Solution

The fourth proportional to 72,756.09, 109,090.40 and 27,780.39 is: 41,653.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,756.09 : 109,090.40 = 27,780.39 : x
  2. Step 2: Convert to fraction form
    72,756.09/109,090.40 = 27,780.39/x
  3. Step 3: Cross multiply
    72,756.09x = 109,090.40 × 27,780.39
  4. Step 4: Simplify right side
    72,756.09x = 3,030,573,718.35
  5. Step 5: Solve for x
    x = 3,030,573,718.35/72,756.09
  6. Step 6: Final answer
    x = 41,653.88

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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.