Home / 131,840.49-181,938.78-71,409.72

Finding the Fourth Proportional to 131,840.49, 181,938.78 and 71,409.72

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Solution

The fourth proportional to 131,840.49, 181,938.78 and 71,409.72 is: 98,544.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,840.49 : 181,938.78 = 71,409.72 : x
  2. Step 2: Convert to fraction form
    131,840.49/181,938.78 = 71,409.72/x
  3. Step 3: Cross multiply
    131,840.49x = 181,938.78 × 71,409.72
  4. Step 4: Simplify right side
    131,840.49x = 12,992,197,336.94
  5. Step 5: Solve for x
    x = 12,992,197,336.94/131,840.49
  6. Step 6: Final answer
    x = 98,544.82

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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.