Home / 131,740.64-181,906.88-121,665.40

Finding the Fourth Proportional to 131,740.64, 181,906.88 and 121,665.40

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Solution

The fourth proportional to 131,740.64, 181,906.88 and 121,665.40 is: 167,995.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,740.64 : 181,906.88 = 121,665.40 : x
  2. Step 2: Convert to fraction form
    131,740.64/181,906.88 = 121,665.40/x
  3. Step 3: Cross multiply
    131,740.64x = 181,906.88 × 121,665.40
  4. Step 4: Simplify right side
    131,740.64x = 22,131,773,317.95
  5. Step 5: Solve for x
    x = 22,131,773,317.95/131,740.64
  6. Step 6: Final answer
    x = 167,995.03

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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.