Home / 104,289.29-143,815.59-78,509.57

Finding the Fourth Proportional to 104,289.29, 143,815.59 and 78,509.57

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Solution

The fourth proportional to 104,289.29, 143,815.59 and 78,509.57 is: 108,265.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,289.29 : 143,815.59 = 78,509.57 : x
  2. Step 2: Convert to fraction form
    104,289.29/143,815.59 = 78,509.57/x
  3. Step 3: Cross multiply
    104,289.29x = 143,815.59 × 78,509.57
  4. Step 4: Simplify right side
    104,289.29x = 11,290,900,130.20
  5. Step 5: Solve for x
    x = 11,290,900,130.20/104,289.29
  6. Step 6: Final answer
    x = 108,265.19

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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.