Home / 116,639.14-160,879.09-77,857.40

Finding the Fourth Proportional to 116,639.14, 160,879.09 and 77,857.40

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Solution

The fourth proportional to 116,639.14, 160,879.09 and 77,857.40 is: 107,387.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,639.14 : 160,879.09 = 77,857.40 : x
  2. Step 2: Convert to fraction form
    116,639.14/160,879.09 = 77,857.40/x
  3. Step 3: Cross multiply
    116,639.14x = 160,879.09 × 77,857.40
  4. Step 4: Simplify right side
    116,639.14x = 12,525,627,661.77
  5. Step 5: Solve for x
    x = 12,525,627,661.77/116,639.14
  6. Step 6: Final answer
    x = 107,387.86

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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.