Home / 131,857.08-181,963.64-71,427.72

Finding the Fourth Proportional to 131,857.08, 181,963.64 and 71,427.72

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Solution

The fourth proportional to 131,857.08, 181,963.64 and 71,427.72 is: 98,570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,857.08 : 181,963.64 = 71,427.72 : x
  2. Step 2: Convert to fraction form
    131,857.08/181,963.64 = 71,427.72/x
  3. Step 3: Cross multiply
    131,857.08x = 181,963.64 × 71,427.72
  4. Step 4: Simplify right side
    131,857.08x = 12,997,247,928.10
  5. Step 5: Solve for x
    x = 12,997,247,928.10/131,857.08
  6. Step 6: Final answer
    x = 98,570.72

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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.