Home / 131,343.39-181,985.94-128,505.78

Finding the Fourth Proportional to 131,343.39, 181,985.94 and 128,505.78

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Solution

The fourth proportional to 131,343.39, 181,985.94 and 128,505.78 is: 178,054.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,343.39 : 181,985.94 = 128,505.78 : x
  2. Step 2: Convert to fraction form
    131,343.39/181,985.94 = 128,505.78/x
  3. Step 3: Cross multiply
    131,343.39x = 181,985.94 × 128,505.78
  4. Step 4: Simplify right side
    131,343.39x = 23,386,245,168.73
  5. Step 5: Solve for x
    x = 23,386,245,168.73/131,343.39
  6. Step 6: Final answer
    x = 178,054.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.