Home / 100,849.12-139,171.80-55,527.28

Finding the Fourth Proportional to 100,849.12, 139,171.80 and 55,527.28

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Solution

The fourth proportional to 100,849.12, 139,171.80 and 55,527.28 is: 76,627.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,849.12 : 139,171.80 = 55,527.28 : x
  2. Step 2: Convert to fraction form
    100,849.12/139,171.80 = 55,527.28/x
  3. Step 3: Cross multiply
    100,849.12x = 139,171.80 × 55,527.28
  4. Step 4: Simplify right side
    100,849.12x = 7,727,831,506.70
  5. Step 5: Solve for x
    x = 7,727,831,506.70/100,849.12
  6. Step 6: Final answer
    x = 76,627.65

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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.