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Finding the Fourth Proportional to 100,725.53, 139,004.64 and 55,406.88

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Solution

The fourth proportional to 100,725.53, 139,004.64 and 55,406.88 is: 76,463.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,725.53 : 139,004.64 = 55,406.88 : x
  2. Step 2: Convert to fraction form
    100,725.53/139,004.64 = 55,406.88/x
  3. Step 3: Cross multiply
    100,725.53x = 139,004.64 × 55,406.88
  4. Step 4: Simplify right side
    100,725.53x = 7,701,813,407.92
  5. Step 5: Solve for x
    x = 7,701,813,407.92/100,725.53
  6. Step 6: Final answer
    x = 76,463.37

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1.5x scale

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.