Home / 78,271.13-107,972.79-55,619.28

Finding the Fourth Proportional to 78,271.13, 107,972.79 and 55,619.28

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Solution

The fourth proportional to 78,271.13, 107,972.79 and 55,619.28 is: 76,725.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,271.13 : 107,972.79 = 55,619.28 : x
  2. Step 2: Convert to fraction form
    78,271.13/107,972.79 = 55,619.28/x
  3. Step 3: Cross multiply
    78,271.13x = 107,972.79 × 55,619.28
  4. Step 4: Simplify right side
    78,271.13x = 6,005,368,839.39
  5. Step 5: Solve for x
    x = 6,005,368,839.39/78,271.13
  6. Step 6: Final answer
    x = 76,725.21

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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.