Home / 117,731.16-162,516.06-72,427.50

Finding the Fourth Proportional to 117,731.16, 162,516.06 and 72,427.50

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Solution

The fourth proportional to 117,731.16, 162,516.06 and 72,427.50 is: 99,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,731.16 : 162,516.06 = 72,427.50 : x
  2. Step 2: Convert to fraction form
    117,731.16/162,516.06 = 72,427.50/x
  3. Step 3: Cross multiply
    117,731.16x = 162,516.06 × 72,427.50
  4. Step 4: Simplify right side
    117,731.16x = 11,770,631,935.65
  5. Step 5: Solve for x
    x = 11,770,631,935.65/117,731.16
  6. Step 6: Final answer
    x = 99,978.90

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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.