Home / 128,437.20-192,656.40-45,331.20

Finding the Fourth Proportional to 128,437.20, 192,656.40 and 45,331.20

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Solution

The fourth proportional to 128,437.20, 192,656.40 and 45,331.20 is: 67,997.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,437.20 : 192,656.40 = 45,331.20 : x
  2. Step 2: Convert to fraction form
    128,437.20/192,656.40 = 45,331.20/x
  3. Step 3: Cross multiply
    128,437.20x = 192,656.40 × 45,331.20
  4. Step 4: Simplify right side
    128,437.20x = 8,733,345,799.68
  5. Step 5: Solve for x
    x = 8,733,345,799.68/128,437.20
  6. Step 6: Final answer
    x = 67,997.01

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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.