Home / 135,420.08-187,037.76-108,289.73

Finding the Fourth Proportional to 135,420.08, 187,037.76 and 108,289.73

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Solution

The fourth proportional to 135,420.08, 187,037.76 and 108,289.73 is: 149,566.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,420.08 : 187,037.76 = 108,289.73 : x
  2. Step 2: Convert to fraction form
    135,420.08/187,037.76 = 108,289.73/x
  3. Step 3: Cross multiply
    135,420.08x = 187,037.76 × 108,289.73
  4. Step 4: Simplify right side
    135,420.08x = 20,254,267,595.02
  5. Step 5: Solve for x
    x = 20,254,267,595.02/135,420.08
  6. Step 6: Final answer
    x = 149,566.21

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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.