Home / 106,749.94-159,995.42-78,407.18

Finding the Fourth Proportional to 106,749.94, 159,995.42 and 78,407.18

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Solution

The fourth proportional to 106,749.94, 159,995.42 and 78,407.18 is: 117,515.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,749.94 : 159,995.42 = 78,407.18 : x
  2. Step 2: Convert to fraction form
    106,749.94/159,995.42 = 78,407.18/x
  3. Step 3: Cross multiply
    106,749.94x = 159,995.42 × 78,407.18
  4. Step 4: Simplify right side
    106,749.94x = 12,544,789,695.12
  5. Step 5: Solve for x
    x = 12,544,789,695.12/106,749.94
  6. Step 6: Final answer
    x = 117,515.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.