Home / 138,796.10-208,145.55-72,214.10

Finding the Fourth Proportional to 138,796.10, 208,145.55 and 72,214.10

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Solution

The fourth proportional to 138,796.10, 208,145.55 and 72,214.10 is: 108,295.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,796.10 : 208,145.55 = 72,214.10 : x
  2. Step 2: Convert to fraction form
    138,796.10/208,145.55 = 72,214.10/x
  3. Step 3: Cross multiply
    138,796.10x = 208,145.55 × 72,214.10
  4. Step 4: Simplify right side
    138,796.10x = 15,031,043,562.26
  5. Step 5: Solve for x
    x = 15,031,043,562.26/138,796.10
  6. Step 6: Final answer
    x = 108,295.86

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1.5x scale

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.