Home / 117,857.09-162,639.63-64,140.95

Finding the Fourth Proportional to 117,857.09, 162,639.63 and 64,140.95

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Solution

The fourth proportional to 117,857.09, 162,639.63 and 64,140.95 is: 88,512.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,857.09 : 162,639.63 = 64,140.95 : x
  2. Step 2: Convert to fraction form
    117,857.09/162,639.63 = 64,140.95/x
  3. Step 3: Cross multiply
    117,857.09x = 162,639.63 × 64,140.95
  4. Step 4: Simplify right side
    117,857.09x = 10,431,859,562.65
  5. Step 5: Solve for x
    x = 10,431,859,562.65/117,857.09
  6. Step 6: Final answer
    x = 88,512.79

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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.