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Finding the Fourth Proportional to 106,619.55, 147,015.03 and 87,177.81

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Solution

The fourth proportional to 106,619.55, 147,015.03 and 87,177.81 is: 120,207.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,619.55 : 147,015.03 = 87,177.81 : x
  2. Step 2: Convert to fraction form
    106,619.55/147,015.03 = 87,177.81/x
  3. Step 3: Cross multiply
    106,619.55x = 147,015.03 × 87,177.81
  4. Step 4: Simplify right side
    106,619.55x = 12,816,448,352.48
  5. Step 5: Solve for x
    x = 12,816,448,352.48/106,619.55
  6. Step 6: Final answer
    x = 120,207.30

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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.