Home / 131,740.40-181,873.68-90,965

Finding the Fourth Proportional to 131,740.40, 181,873.68 and 90,965

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Solution

The fourth proportional to 131,740.40, 181,873.68 and 90,965 is: 125,581.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,740.40 : 181,873.68 = 90,965 : x
  2. Step 2: Convert to fraction form
    131,740.40/181,873.68 = 90,965/x
  3. Step 3: Cross multiply
    131,740.40x = 181,873.68 × 90,965
  4. Step 4: Simplify right side
    131,740.40x = 16,544,139,301.20
  5. Step 5: Solve for x
    x = 16,544,139,301.20/131,740.40
  6. Step 6: Final answer
    x = 125,581.37

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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.